#37A5AE
Closest named color: Cadet Blue (#5F9EA0). oklch(66.5% 0.097 203), rgb(55, 165, 174).
Aa
Black text reads best on this color (7.15:1).
About this color
#37A5AE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.097 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.034 away. Black text reads best on it, at 7.15:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.15:1 |
| White text | 2.93:1 |
Values
| HEX | #37A5AE |
| RGB | rgb(55, 165, 174) |
| HSL | hsl(185, 52%, 45%) |
| OKLCH | oklch(66.5% 0.097 203) |
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 #37A5AE | 2.93:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #37A5AE | 7.15:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #37A5AE text on white | 2.93:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #37A5AE text on black | 7.15:1 | AAA | Lc -46.3 | 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 500.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C6DFE1
oklch(88.6% 0.027 202.5)
-
Step 300
300
#9DCACE
oklch(80.8% 0.048 203)
-
Step 400
400
#63AFB6
oklch(70.8% 0.076 203.3)
-
Step 500
500 (this color)
#37A5AE
oklch(66.5% 0.097 203)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#024B50
oklch(37.6% 0.063 202.6)
-
Step 950
950
#082C2F
oklch(27% 0.04 203.1)
#37A5AE 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) | #989EAF | 0.097 |
| Deuteranopia (no green cones) | #8791AE | 0.090 |
| Tritanopia (no blue cones) | #00ABA7 | 0.027 |
| Achromatopsia (no color) | #979797 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A5AE
#37A5AE
oklch(66.5% 0.097 203)
- #C97B77
#C97B77
oklch(66.5% 0.098 23.2)
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 #37A5AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.034
- Turquoise Blue #06B1C4 ΔE 0.039
- Light Sea Green #20B2AA ΔE 0.041
- Sea #3C9992 ΔE 0.046
- Dull Teal #5F9E8F ΔE 0.048
- Persian Green #2A9D8F ΔE 0.049
- Grey Teal #5E9B8A ΔE 0.054
- Blue Green #0F9B8E ΔE 0.056
Use #37A5AE 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.