#37C4CB
Closest named color: Dark Turquoise (#00CED1). oklch(75.1% 0.115 200), rgb(55, 196, 203).
Aa
Black text reads best on this color (9.92:1).
About this color
#37C4CB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.115 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.027 away. Black text reads best on it, at 9.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.92:1 |
| White text | 2.11:1 |
Values
| HEX | #37C4CB |
| RGB | rgb(55, 196, 203) |
| HSL | hsl(183, 59%, 51%) |
| OKLCH | oklch(75.1% 0.115 200) |
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 #37C4CB | 2.11:1 | Fails | Lc -45.7 | Large or bold text, headings |
| Black text on #37C4CB | 9.92:1 | AAA | Lc 62.9 | Content text, not long reading |
| #37C4CB text on white | 2.11:1 | Fails | Lc 41.1 | Non-text elements, placeholder text |
| #37C4CB text on black | 9.92:1 | AAA | Lc -61.2 | 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 400.
-
Step 50
50
#EEF8F8
oklch(97.2% 0.011 197)
-
Step 100
100
#DBEEEF
oklch(93.5% 0.02 200.6)
-
Step 200
200
#BBE2E3
oklch(88.5% 0.041 198.4)
-
Step 300
300
#87CFD3
oklch(80.9% 0.072 200.3)
-
Step 400
400 (this color)
#37C4CB
oklch(75.1% 0.115 200)
-
Step 500
500
#009CA3
oklch(63% 0.107 200.4)
-
Step 600
600
#008489
oklch(55.7% 0.095 199.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004C4F
oklch(37.8% 0.064 199.4)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#37C4CB 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) | #B5BBCC | 0.117 |
| Deuteranopia (no green cones) | #A0ACCC | 0.108 |
| Tritanopia (no blue cones) | #00CBC6 | 0.025 |
| Achromatopsia (no color) | #B2B2B2 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37C4CB
#37C4CB
oklch(75.1% 0.115 200)
- #EF9090
#EF9090
oklch(75.2% 0.116 20.1)
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 #37C4CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.027
- Medium Turquoise #48D1CC ΔE 0.039
- Topaz #13BBAF ΔE 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.058
- Aqua Blue #02D8E9 ΔE 0.059
- Light Sea Green #20B2AA ΔE 0.064
- Medium Aquamarine #66CDAA ΔE 0.066
Use #37C4CB 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.