#37B5C6
Closest named color: Turquoise Blue (#06B1C4). oklch(71.3% 0.109 208.2), rgb(55, 181, 198).
Aa
Black text reads best on this color (8.58:1).
About this color
#37B5C6 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.109 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.020 away. Black text reads best on it, at 8.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.58:1 |
| White text | 2.44:1 |
Values
| HEX | #37B5C6 |
| RGB | rgb(55, 181, 198) |
| HSL | hsl(187, 57%, 50%) |
| OKLCH | oklch(71.3% 0.109 208.2) |
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 #37B5C6 | 2.44:1 | Fails | Lc -52.7 | Large or bold text, headings |
| Black text on #37B5C6 | 8.58:1 | AAA | Lc 56.3 | Large or bold text, headings |
| #37B5C6 text on white | 2.44:1 | Fails | Lc 47.7 | Large or bold text, headings |
| #37B5C6 text on black | 8.58:1 | AAA | Lc -54.3 | 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
#DCEEF1
oklch(93.7% 0.019 208.8)
-
Step 200
200
#BDE1E6
oklch(88.5% 0.038 206.8)
-
Step 300
300
#8CCDD8
oklch(80.8% 0.068 209.2)
-
Step 400
400 (this color)
#37B5C6
oklch(71.3% 0.109 208.2)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C32
oklch(26.8% 0.046 208.8)
#37B5C6 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) | #A5AEC7 | 0.104 |
| Deuteranopia (no green cones) | #919FC6 | 0.096 |
| Tritanopia (no blue cones) | #00BDBA | 0.036 |
| Achromatopsia (no color) | #A6A6A6 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B5C6
#37B5C6
oklch(71.3% 0.109 208.2)
- #DE877C
#DE877C
oklch(71.2% 0.109 27.8)
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 #37B5C6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.020
- Light Sea Green #20B2AA ΔE 0.044
- Topaz #13BBAF ΔE 0.045
- Greyblue #77A1B5 ΔE 0.067
- Dark Turquoise #00CED1 ΔE 0.068
- Greeny Blue #42B395 ΔE 0.071
- Cadet Blue #5F9EA0 ΔE 0.072
- Bluegrey #85A3B2 ΔE 0.075
Use #37B5C6 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.