#37DDD0
Closest named color: Turquoise (#40E0D0). oklch(81.3% 0.131 186.9), rgb(55, 221, 208).
Aa
Black text reads best on this color (12.41:1).
About this color
#37DDD0 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.131 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.010 away. Black text reads best on it, at 12.41:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.41:1 |
| White text | 1.69:1 |
Values
| HEX | #37DDD0 |
| RGB | rgb(55, 221, 208) |
| HSL | hsl(175, 71%, 54%) |
| OKLCH | oklch(81.3% 0.131 186.9) |
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 #37DDD0 | 1.69:1 | Fails | Lc -33.4 | Non-text elements, placeholder text |
| Black text on #37DDD0 | 12.41:1 | AAA | Lc 74.2 | Content text, not long reading |
| #37DDD0 text on white | 1.69:1 | Fails | Lc 29.6 | Dividers and decoration only |
| #37DDD0 text on black | 12.41:1 | AAA | Lc -73.2 | 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
#E9FAF7
oklch(97.2% 0.018 184.3)
-
Step 100
100
#CFF3EE
oklch(93.7% 0.038 186.3)
-
Step 200
200
#A1E9E1
oklch(88.4% 0.072 187.2)
-
Step 300
300 (this color)
#37DDD0
oklch(81.3% 0.131 186.9)
-
Step 400
400
#00B9AD
oklch(70.7% 0.124 186.6)
-
Step 500
500
#009E94
oklch(63% 0.11 186.9)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D47
oklch(37.8% 0.066 185.9)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#37DDD0 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) | #D1D1D0 | 0.139 |
| Deuteranopia (no green cones) | #BAC0D2 | 0.131 |
| Tritanopia (no blue cones) | #00E2D9 | 0.016 |
| Achromatopsia (no color) | #C7C7C7 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37DDD0
#37DDD0
oklch(81.3% 0.131 186.9)
- #FFA4B6
#FFA4B6
oklch(81.4% 0.109 6.9)
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 #37DDD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.010
- Medium Turquoise #48D1CC ΔE 0.032
- Aqua Blue #02D8E9 ΔE 0.043
- Dark Turquoise #00CED1 ΔE 0.047
- Seafoam Blue #78D1B6 ΔE 0.049
- Aqua Marine #2EE8BB ΔE 0.049
- Medium Aquamarine #66CDAA ΔE 0.057
- Pale Teal #82CBB2 ΔE 0.064
Use #37DDD0 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.