#5BCDB3
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.5% 0.111 175.9), rgb(91, 205, 179).
Aa
Black text reads best on this color (10.82:1).
About this color
#5BCDB3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.111 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.014 away. Black text reads best on it, at 10.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.82:1 |
| White text | 1.93:1 |
Values
| HEX | #5BCDB3 |
| RGB | rgb(91, 205, 179) |
| HSL | hsl(166, 53%, 58%) |
| OKLCH | oklch(77.5% 0.111 175.9) |
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 #5BCDB3 | 1.93:1 | Fails | Lc -41.3 | Non-text elements, placeholder text |
| Black text on #5BCDB3 | 10.82:1 | AAA | Lc 66.9 | Content text, not long reading |
| #5BCDB3 text on white | 1.93:1 | Fails | Lc 37.0 | Non-text elements, placeholder text |
| #5BCDB3 text on black | 10.82:1 | AAA | Lc -65.5 | 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
#D5F1E9
oklch(93.6% 0.031 176.6)
-
Step 200
200
#AEE7D7
oklch(88.4% 0.062 175.7)
-
Step 300
300 (this color)
#5BCDB3
oklch(77.5% 0.111 175.9)
-
Step 400
400
#00BB9D
oklch(70.7% 0.133 175.7)
-
Step 500
500
#00A087
oklch(63.1% 0.118 176.3)
-
Step 600
600
#008771
oklch(55.7% 0.104 175.8)
-
Step 700
700
#00715F
oklch(49% 0.091 176.5)
-
Step 800
800
#005D4D
oklch(42.7% 0.08 175.6)
-
Step 900
900
#004D40
oklch(37.6% 0.07 176.4)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#5BCDB3 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) | #C6C2B2 | 0.116 |
| Deuteranopia (no green cones) | #B5B5B5 | 0.111 |
| Tritanopia (no blue cones) | #0DCFC5 | 0.035 |
| Achromatopsia (no color) | #BABABA | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BCDB3
#5BCDB3
oklch(77.5% 0.111 175.9)
- #EE98B8
#EE98B8
oklch(77.5% 0.11 356.1)
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 #5BCDB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.014
- Seafoam Blue #78D1B6 ΔE 0.028
- Pale Teal #82CBB2 ΔE 0.033
- Medium Turquoise #48D1CC ΔE 0.033
- Dark Turquoise #00CED1 ΔE 0.048
- Emerald #06D6A0 ΔE 0.053
- Turquoise #40E0D0 ΔE 0.055
- Tiffany Blue #94D2BD ΔE 0.058
Use #5BCDB3 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.