#37CFD5
Closest named color: Dark Turquoise (#00CED1). oklch(78.1% 0.121 199), rgb(55, 207, 213).
Aa
Black text reads best on this color (11.04:1).
About this color
#37CFD5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.121 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.015 away. Black text reads best on it, at 11.04:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 11.04:1 |
| White text | 1.90:1 |
Values
| HEX | #37CFD5 |
| RGB | rgb(55, 207, 213) |
| HSL | hsl(182, 65%, 53%) |
| OKLCH | oklch(78.1% 0.121 199) |
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 #37CFD5 | 1.90:1 | Fails | Lc -40.0 | Non-text elements, placeholder text |
| Black text on #37CFD5 | 11.04:1 | AAA | Lc 68.1 | Content text, not long reading |
| #37CFD5 text on white | 1.90:1 | Fails | Lc 35.8 | Non-text elements, placeholder text |
| #37CFD5 text on black | 11.04:1 | AAA | Lc -66.7 | 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
#EAF9F9
oklch(97.1% 0.016 196.9)
-
Step 100
100
#D0F2F3
oklch(93.7% 0.035 198.7)
-
Step 200
200
#A4E7EA
oklch(88.4% 0.067 199.5)
-
Step 300
300 (this color)
#37CFD5
oklch(78.1% 0.121 199)
-
Step 400
400
#00B7BD
oklch(70.8% 0.12 199)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#37CFD5 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) | #C0C5D6 | 0.125 |
| Deuteranopia (no green cones) | #A9B5D6 | 0.115 |
| Tritanopia (no blue cones) | #00D7D0 | 0.027 |
| Achromatopsia (no color) | #BCBCBC | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37CFD5
#37CFD5
oklch(78.1% 0.121 199)
- #FC9799
#FC9799
oklch(78.2% 0.122 18.9)
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 #37CFD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.015
- Medium Turquoise #48D1CC ΔE 0.017
- Aqua Blue #02D8E9 ΔE 0.031
- Vivid Sky Blue #4CC9F0 ΔE 0.049
- Turquoise #40E0D0 ΔE 0.052
- Seafoam Blue #78D1B6 ΔE 0.059
- Medium Aquamarine #66CDAA ΔE 0.061
- Bright Sky Blue #02CCFE ΔE 0.063
Use #37CFD5 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.