#37CDEB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78.5% 0.127 214.7), rgb(55, 205, 235).
Aa
Black text reads best on this color (11.09:1).
About this color
#37CDEB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.127 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.018 away. Black text reads best on it, at 11.09:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.09:1 |
| White text | 1.89:1 |
Values
| HEX | #37CDEB |
| RGB | rgb(55, 205, 235) |
| HSL | hsl(190, 82%, 57%) |
| OKLCH | oklch(78.5% 0.127 214.7) |
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 #37CDEB | 1.89:1 | Fails | Lc -39.8 | Non-text elements, placeholder text |
| Black text on #37CDEB | 11.09:1 | AAA | Lc 68.3 | Content text, not long reading |
| #37CDEB text on white | 1.89:1 | Fails | Lc 35.5 | Non-text elements, placeholder text |
| #37CDEB text on black | 11.09:1 | AAA | Lc -67.0 | 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 300.
-
Step 50
50
#E9F9FD
oklch(97.1% 0.018 214.4)
-
Step 100
100
#CFF1F9
oklch(93.6% 0.037 213.5)
-
Step 200
200
#A3E6F6
oklch(88.6% 0.07 214.2)
-
Step 300
300 (this color)
#37CDEB
oklch(78.5% 0.127 214.7)
-
Step 400
400
#00B4D1
oklch(70.8% 0.125 214.7)
-
Step 500
500
#009AB3
oklch(63.1% 0.111 214.6)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#37CDEB 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) | #B8C6ED | 0.114 |
| Deuteranopia (no green cones) | #A0B5EB | 0.102 |
| Tritanopia (no blue cones) | #00D8D6 | 0.051 |
| Achromatopsia (no color) | #BCBCBC | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37CDEB
#37CDEB
oklch(78.5% 0.127 214.7)
- #FF9A81
#FF9A81
oklch(78.5% 0.127 34.7)
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 #37CDEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.018
- Bright Sky Blue #02CCFE ΔE 0.030
- Aqua Blue #02D8E9 ΔE 0.032
- Dark Turquoise #00CED1 ΔE 0.043
- Medium Turquoise #48D1CC ΔE 0.050
- Lightblue #7BC8F6 ΔE 0.052
- Deep Sky Blue #00BFFF ΔE 0.057
- Sky Blue #87CEEB ΔE 0.057
Use #37CDEB 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.