#37B5CF
Closest named color: Turquoise Blue (#06B1C4). oklch(71.7% 0.112 214.8), rgb(55, 181, 207).
Aa
Black text reads best on this color (8.67:1).
About this color
#37B5CF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.112 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.025 away. Black text reads best on it, at 8.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.67:1 |
| White text | 2.42:1 |
Values
| HEX | #37B5CF |
| RGB | rgb(55, 181, 207) |
| HSL | hsl(190, 61%, 51%) |
| OKLCH | oklch(71.7% 0.112 214.8) |
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 #37B5CF | 2.42:1 | Fails | Lc -52.3 | Large or bold text, headings |
| Black text on #37B5CF | 8.67:1 | AAA | Lc 56.7 | Large or bold text, headings |
| #37B5CF text on white | 2.42:1 | Fails | Lc 47.3 | Large or bold text, headings |
| #37B5CF text on black | 8.67:1 | AAA | Lc -54.7 | Large or bold text, headings |
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
#EFF7F9
oklch(97.1% 0.009 214.3)
-
Step 100
100
#DBEEF2
oklch(93.6% 0.021 211.8)
-
Step 200
200
#BDE0E9
oklch(88.4% 0.039 215)
-
Step 300
300
#8BCDDD
oklch(81% 0.07 214.6)
-
Step 400
400 (this color)
#37B5CF
oklch(71.7% 0.112 214.8)
-
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
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#37B5CF 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) | #A3AFD0 | 0.101 |
| Deuteranopia (no green cones) | #8EA0CF | 0.091 |
| Tritanopia (no blue cones) | #00BFBD | 0.047 |
| Achromatopsia (no color) | #A6A6A6 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B5CF
#37B5CF
oklch(71.7% 0.112 214.8)
- #E08973
#E08973
oklch(71.6% 0.112 35)
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 #37B5CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.025
- Light Sea Green #20B2AA ΔE 0.057
- Topaz #13BBAF ΔE 0.058
- Vivid Sky Blue #4CC9F0 ΔE 0.068
- Deep Sky Blue #00BFFF ΔE 0.068
- Greyblue #77A1B5 ΔE 0.069
- Dark Turquoise #00CED1 ΔE 0.070
- Bluegrey #85A3B2 ΔE 0.077
Use #37B5CF 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.