#37C2E9
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.8% 0.126 221.4), rgb(55, 194, 233).
Aa
Black text reads best on this color (10.05:1).
About this color
#37C2E9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.126 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.025 away. Black text reads best on it, at 10.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.05:1 |
| White text | 2.08:1 |
Values
| HEX | #37C2E9 |
| RGB | rgb(55, 194, 233) |
| HSL | hsl(193, 80%, 56%) |
| OKLCH | oklch(75.8% 0.126 221.4) |
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 #37C2E9 | 2.08:1 | Fails | Lc -45.0 | Non-text elements, placeholder text |
| Black text on #37C2E9 | 10.05:1 | AAA | Lc 63.5 | Content text, not long reading |
| #37C2E9 text on white | 2.08:1 | Fails | Lc 40.4 | Non-text elements, placeholder text |
| #37C2E9 text on black | 10.05:1 | AAA | Lc -61.9 | 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
#EAF8FE
oklch(97% 0.017 225.2)
-
Step 100
100
#D0F0FB
oklch(93.5% 0.037 220.5)
-
Step 200
200
#A6E4FA
oklch(88.4% 0.069 221.9)
-
Step 300
300 (this color)
#37C2E9
oklch(75.8% 0.126 221.4)
-
Step 400
400
#00B2DA
oklch(70.7% 0.13 221.5)
-
Step 500
500
#0098BB
oklch(63% 0.116 221.8)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#002C38
oklch(27.2% 0.05 221.4)
#37C2E9 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) | #ABBDEB | 0.103 |
| Deuteranopia (no green cones) | #93ACE9 | 0.091 |
| Tritanopia (no blue cones) | #00CECF | 0.060 |
| Achromatopsia (no color) | #B3B3B3 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37C2E9
#37C2E9
oklch(75.8% 0.126 221.4)
- #F49470
#F49470
oklch(75.9% 0.126 41.2)
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 #37C2E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.025
- Bright Sky Blue #02CCFE ΔE 0.035
- Deep Sky Blue #00BFFF ΔE 0.037
- Lightblue #7BC8F6 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.057
- Aqua Blue #02D8E9 ΔE 0.061
- Sky #82CAFC ΔE 0.068
- Turquoise Blue #06B1C4 ΔE 0.069
Use #37C2E9 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.