#37C4DB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.7% 0.119 211.1), rgb(55, 196, 219).
Aa
Black text reads best on this color (10.08:1).
About this color
#37C4DB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.119 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.035 away. Black text reads best on it, at 10.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.08:1 |
| White text | 2.08:1 |
Values
| HEX | #37C4DB |
| RGB | rgb(55, 196, 219) |
| HSL | hsl(188, 69%, 54%) |
| OKLCH | oklch(75.7% 0.119 211.1) |
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 #37C4DB | 2.08:1 | Fails | Lc -44.9 | Non-text elements, placeholder text |
| Black text on #37C4DB | 10.08:1 | AAA | Lc 63.6 | Content text, not long reading |
| #37C4DB text on white | 2.08:1 | Fails | Lc 40.3 | Non-text elements, placeholder text |
| #37C4DB text on black | 10.08:1 | AAA | Lc -62.0 | 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
#EEF7F9
oklch(97% 0.01 212.5)
-
Step 100
100
#DAEEF2
oklch(93.6% 0.022 211)
-
Step 200
200
#BBE1E9
oklch(88.5% 0.041 211.9)
-
Step 300
300
#86CEDC
oklch(80.9% 0.074 211.2)
-
Step 400
400 (this color)
#37C4DB
oklch(75.7% 0.119 211.1)
-
Step 500
500
#009BAF
oklch(63.2% 0.11 210.8)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#37C4DB 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) | #B1BDDC | 0.110 |
| Deuteranopia (no green cones) | #9BADDB | 0.100 |
| Tritanopia (no blue cones) | #00CECB | 0.044 |
| Achromatopsia (no color) | #B4B4B4 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37C4DB
#37C4DB
oklch(75.7% 0.119 211.1)
- #F29381
#F29381
oklch(75.8% 0.119 31.5)
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 #37C4DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Dark Turquoise #00CED1 ΔE 0.037
- Bright Sky Blue #02CCFE ΔE 0.049
- Medium Turquoise #48D1CC ΔE 0.050
- Aqua Blue #02D8E9 ΔE 0.053
- Deep Sky Blue #00BFFF ΔE 0.059
- Turquoise Blue #06B1C4 ΔE 0.061
- Lightblue #7BC8F6 ΔE 0.067
Use #37C4DB 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.