#37A899
Closest named color: Light Sea Green (#20B2AA). oklch(66.5% 0.102 182.6), rgb(55, 168, 153).
Aa
Black text reads best on this color (7.22:1).
About this color
#37A899 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.102 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.031 away. Black text reads best on it, at 7.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.22:1 |
| White text | 2.90:1 |
Values
| HEX | #37A899 |
| RGB | rgb(55, 168, 153) |
| HSL | hsl(172, 51%, 44%) |
| OKLCH | oklch(66.5% 0.102 182.6) |
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 #37A899 | 2.90:1 | Fails | Lc -60.4 | Content text, not long reading |
| Black text on #37A899 | 7.22:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #37A899 text on white | 2.90:1 | Fails | Lc 55.1 | Large or bold text, headings |
| #37A899 text on black | 7.22:1 | AAA | Lc -46.7 | 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 500.
-
Step 50
50
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E0EDEB
oklch(93.6% 0.014 185.9)
-
Step 200
200
#C6DFDB
oklch(88.4% 0.027 185.1)
-
Step 300
300
#9DCCC3
oklch(80.9% 0.051 181.9)
-
Step 400
400
#63B1A5
oklch(70.7% 0.08 182.9)
-
Step 500
500 (this color)
#37A899
oklch(66.5% 0.102 182.6)
-
Step 600
600
#008678
oklch(55.6% 0.1 182.2)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#014D45
oklch(37.8% 0.067 183)
-
Step 950
950
#082D28
oklch(27% 0.042 182.3)
#37A899 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) | #A09E98 | 0.109 |
| Deuteranopia (no green cones) | #90929A | 0.104 |
| Tritanopia (no blue cones) | #00ABA3 | 0.018 |
| Achromatopsia (no color) | #979797 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A899
#37A899
oklch(66.5% 0.102 182.6)
- #C8788E
#C8788E
oklch(66.5% 0.103 2.5)
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 #37A899, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.031
- Persian Green #2A9D8F ΔE 0.034
- Dull Teal #5F9E8F ΔE 0.036
- Greeny Blue #42B395 ΔE 0.037
- Grey Teal #5E9B8A ΔE 0.042
- Sea #3C9992 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.044
- Blue Green #0F9B8E ΔE 0.044
Use #37A899 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.