#55CDB4
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.3% 0.114 177.1), rgb(85, 205, 180).
Aa
Black text reads best on this color (10.77:1).
About this color
#55CDB4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.114 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.017 away. Black text reads best on it, at 10.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.77:1 |
| White text | 1.94:1 |
Values
| HEX | #55CDB4 |
| RGB | rgb(85, 205, 180) |
| HSL | hsl(168, 55%, 57%) |
| OKLCH | oklch(77.3% 0.114 177.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #55CDB4 | 1.94:1 | Fails | Lc -41.5 | Non-text elements, placeholder text |
| Black text on #55CDB4 | 10.77:1 | AAA | Lc 66.7 | Content text, not long reading |
| #55CDB4 text on white | 1.94:1 | Fails | Lc 37.2 | Non-text elements, placeholder text |
| #55CDB4 text on black | 10.77:1 | AAA | Lc -65.3 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#EBF9F5
oklch(97.1% 0.016 177.1)
-
Step 100
100
#D4F2E9
oklch(93.7% 0.034 175.6)
-
Step 200
200
#ADE7D8
oklch(88.4% 0.063 177.1)
-
Step 300
300 (this color)
#55CDB4
oklch(77.3% 0.114 177.1)
-
Step 400
400
#00BB9F
oklch(70.8% 0.132 176.8)
-
Step 500
500
#00A088
oklch(63.1% 0.117 177)
-
Step 600
600
#008772
oklch(55.7% 0.104 176.6)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#004D41
oklch(37.6% 0.069 177.7)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#55CDB4 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #C6C1B3 | 0.120 |
| Deuteranopia (no green cones) | #B4B4B6 | 0.115 |
| Tritanopia (no blue cones) | #00D0C5 | 0.031 |
| Achromatopsia (no color) | #BABABA | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55CDB4
#55CDB4
oklch(77.3% 0.114 177.1)
- #F096B6
#F096B6
oklch(77.4% 0.114 357.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #55CDB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.017
- Seafoam Blue #78D1B6 ΔE 0.032
- Medium Turquoise #48D1CC ΔE 0.032
- Pale Teal #82CBB2 ΔE 0.036
- Dark Turquoise #00CED1 ΔE 0.045
- Emerald #06D6A0 ΔE 0.052
- Turquoise #40E0D0 ΔE 0.054
- Tiffany Blue #94D2BD ΔE 0.061
Use #55CDB4 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.