#55CBB5
Closest named color: Medium Aquamarine (#66CDAA). oklch(76.9% 0.111 178.9), rgb(85, 203, 181).
Aa
Black text reads best on this color (10.59:1).
About this color
#55CBB5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.111 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.021 away. Black text reads best on it, at 10.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.59:1 |
| White text | 1.98:1 |
Values
| HEX | #55CBB5 |
| RGB | rgb(85, 203, 181) |
| HSL | hsl(169, 53%, 56%) |
| OKLCH | oklch(76.9% 0.111 178.9) |
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 #55CBB5 | 1.98:1 | Fails | Lc -42.4 | Non-text elements, placeholder text |
| Black text on #55CBB5 | 10.59:1 | AAA | Lc 65.9 | Content text, not long reading |
| #55CBB5 text on white | 1.98:1 | Fails | Lc 38.0 | Non-text elements, placeholder text |
| #55CBB5 text on black | 10.59:1 | AAA | Lc -64.4 | 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
#ECF9F5
oklch(97.1% 0.015 175.7)
-
Step 100
100
#D4F1EA
oklch(93.5% 0.032 179.4)
-
Step 200
200
#ADE7DA
oklch(88.5% 0.062 179.4)
-
Step 300
300 (this color)
#55CBB5
oklch(76.9% 0.111 178.9)
-
Step 400
400
#00BAA2
oklch(70.6% 0.129 179.1)
-
Step 500
500
#00A08B
oklch(63.2% 0.115 179)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#55CBB5 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) | #C3C0B4 | 0.117 |
| Deuteranopia (no green cones) | #B1B3B7 | 0.111 |
| Tritanopia (no blue cones) | #00CEC4 | 0.030 |
| Achromatopsia (no color) | #B8B8B8 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55CBB5
#55CBB5
oklch(76.9% 0.111 178.9)
- #EE95B2
#EE95B2
oklch(76.9% 0.112 359)
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 #55CBB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.021
- Medium Turquoise #48D1CC ΔE 0.031
- Seafoam Blue #78D1B6 ΔE 0.035
- Pale Teal #82CBB2 ΔE 0.037
- Dark Turquoise #00CED1 ΔE 0.043
- Emerald #06D6A0 ΔE 0.057
- Topaz #13BBAF ΔE 0.058
- Turquoise #40E0D0 ΔE 0.058
Use #55CBB5 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.