#37B5A8
Closest named color: Light Sea Green (#20B2AA). oklch(70.2% 0.109 185), rgb(55, 181, 168).
Aa
Black text reads best on this color (8.33:1).
About this color
#37B5A8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.109 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.014 away. Black text reads best on it, at 8.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 8.33:1 |
| White text | 2.51:1 |
Values
| HEX | #37B5A8 |
| RGB | rgb(55, 181, 168) |
| HSL | hsl(174, 53%, 46%) |
| OKLCH | oklch(70.2% 0.109 185) |
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 #37B5A8 | 2.51:1 | Fails | Lc -54.1 | Large or bold text, headings |
| Black text on #37B5A8 | 8.33:1 | AAA | Lc 55.0 | Large or bold text, headings |
| #37B5A8 text on white | 2.51:1 | Fails | Lc 49.0 | Large or bold text, headings |
| #37B5A8 text on black | 8.33:1 | AAA | Lc -52.9 | 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
#EFF8F6
oklch(97.2% 0.01 181.4)
-
Step 100
100
#DCEEEB
oklch(93.5% 0.019 184.9)
-
Step 200
200
#BEE2DC
oklch(88.5% 0.039 184.3)
-
Step 300
300
#8DCFC6
oklch(80.8% 0.068 185.3)
-
Step 400
400 (this color)
#37B5A8
oklch(70.2% 0.109 185)
-
Step 500
500
#009F92
oklch(63.2% 0.111 184.7)
-
Step 600
600
#00857B
oklch(55.5% 0.097 185.6)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#37B5A8 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) | #ACABA8 | 0.116 |
| Deuteranopia (no green cones) | #9A9EA9 | 0.109 |
| Tritanopia (no blue cones) | #00B9B1 | 0.017 |
| Achromatopsia (no color) | #A3A3A3 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B5A8
#37B5A8
oklch(70.2% 0.109 185)
- #D88196
#D88196
oklch(70.2% 0.11 4.7)
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 #37B5A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.014
- Topaz #13BBAF ΔE 0.018
- Greeny Blue #42B395 ΔE 0.026
- Turquoise Blue #06B1C4 ΔE 0.048
- Green Blue #01C08D ΔE 0.060
- Tea #65AB7C ΔE 0.061
- Dull Teal #5F9E8F ΔE 0.065
- Cadet Blue #5F9EA0 ΔE 0.066
Use #37B5A8 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.