#37CBB1
Closest named color: Medium Aquamarine (#66CDAA). oklch(76% 0.127 178), rgb(55, 203, 177).
Aa
Black text reads best on this color (10.33:1).
About this color
#37CBB1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.127 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.031 away. Black text reads best on it, at 10.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.33:1 |
| White text | 2.03:1 |
Values
| HEX | #37CBB1 |
| RGB | rgb(55, 203, 177) |
| HSL | hsl(169, 59%, 51%) |
| OKLCH | oklch(76% 0.127 178) |
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 #37CBB1 | 2.03:1 | Fails | Lc -43.5 | Non-text elements, placeholder text |
| Black text on #37CBB1 | 10.33:1 | AAA | Lc 64.9 | Content text, not long reading |
| #37CBB1 text on white | 2.03:1 | Fails | Lc 39.1 | Non-text elements, placeholder text |
| #37CBB1 text on black | 10.33:1 | AAA | Lc -63.3 | 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 300.
-
Step 50
50
#EAF9F5
oklch(97% 0.017 178.3)
-
Step 100
100
#D1F2EA
oklch(93.5% 0.036 179.2)
-
Step 200
200
#A6E9D9
oklch(88.5% 0.071 178.1)
-
Step 300
300 (this color)
#37CBB1
oklch(76% 0.127 178)
-
Step 400
400
#00BAA1
oklch(70.6% 0.129 178.5)
-
Step 500
500
#00A089
oklch(63.1% 0.116 177.6)
-
Step 600
600
#008673
oklch(55.5% 0.102 178.1)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#37CBB1 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) | #C3BEB0 | 0.134 |
| Deuteranopia (no green cones) | #AFB0B3 | 0.127 |
| Tritanopia (no blue cones) | #00CEC3 | 0.025 |
| Achromatopsia (no color) | #B6B6B6 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37CBB1
#37CBB1
oklch(76% 0.127 178)
- #F18DB1
#F18DB1
oklch(75.9% 0.128 357.5)
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 #37CBB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.031
- Medium Turquoise #48D1CC ΔE 0.041
- Dark Turquoise #00CED1 ΔE 0.044
- Emerald #06D6A0 ΔE 0.047
- Topaz #13BBAF ΔE 0.050
- Seafoam Blue #78D1B6 ΔE 0.050
- Greenblue #23C48B ΔE 0.054
- Pale Teal #82CBB2 ΔE 0.054
Use #37CBB1 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.