#37C8AA
Closest named color: Medium Aquamarine (#66CDAA). oklch(75% 0.128 175.4), rgb(55, 200, 170).
Aa
Black text reads best on this color (10.00:1).
About this color
#37C8AA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.128 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.035 away. Black text reads best on it, at 10.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.00:1 |
| White text | 2.09:1 |
Values
| HEX | #37C8AA |
| RGB | rgb(55, 200, 170) |
| HSL | hsl(168, 57%, 50%) |
| OKLCH | oklch(75% 0.128 175.4) |
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 #37C8AA | 2.09:1 | Fails | Lc -45.3 | Large or bold text, headings |
| Black text on #37C8AA | 10.00:1 | AAA | Lc 63.3 | Content text, not long reading |
| #37C8AA text on white | 2.09:1 | Fails | Lc 40.7 | Non-text elements, placeholder text |
| #37C8AA text on black | 10.00:1 | AAA | Lc -61.6 | Content text, not long reading |
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
#EFF8F5
oklch(97.2% 0.01 174.3)
-
Step 100
100
#DBEFE9
oklch(93.6% 0.023 175.9)
-
Step 200
200
#BCE3D8
oklch(88.5% 0.043 176.3)
-
Step 300
300
#88D2BE
oklch(80.9% 0.079 175.3)
-
Step 400
400 (this color)
#37C8AA
oklch(75% 0.128 175.4)
-
Step 500
500
#00A086
oklch(63% 0.118 175.6)
-
Step 600
600
#008770
oklch(55.7% 0.105 175.1)
-
Step 700
700
#00715E
oklch(49% 0.092 175.6)
-
Step 800
800
#005D4D
oklch(42.7% 0.08 175.6)
-
Step 900
900
#004E40
oklch(37.9% 0.071 175.3)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#37C8AA 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) | #C1BBA9 | 0.134 |
| Deuteranopia (no green cones) | #ADADAC | 0.127 |
| Tritanopia (no blue cones) | #00CBBF | 0.029 |
| Achromatopsia (no color) | #B3B3B3 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37C8AA
#37C8AA
oklch(75% 0.128 175.4)
- #ED8AB2
#ED8AB2
oklch(75% 0.129 354.9)
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 #37C8AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.035
- Topaz #13BBAF ΔE 0.044
- Greenblue #23C48B ΔE 0.044
- Green Blue #01C08D ΔE 0.047
- Emerald #06D6A0 ΔE 0.047
- Medium Turquoise #48D1CC ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.053
- Seafoam Blue #78D1B6 ΔE 0.057
Use #37C8AA 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.