#37A191
Closest named color: Persian Green (#2A9D8F). oklch(64.5% 0.099 181.1), rgb(55, 161, 145).
Aa
Black text reads best on this color (6.66:1).
About this color
#37A191 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.099 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Persian Green (#2A9D8F), ΔE 0.015 away. Black text reads best on it, at 6.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Persian Green (#2A9D8F) |
| Black text | 6.66:1 |
| White text | 3.14:1 |
Values
| HEX | #37A191 |
| RGB | rgb(55, 161, 145) |
| HSL | hsl(171, 49%, 42%) |
| OKLCH | oklch(64.5% 0.099 181.1) |
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 #37A191 | 3.14:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #37A191 | 6.66:1 | AA | Lc 45.8 | Large or bold text, headings |
| #37A191 text on white | 3.14:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #37A191 text on black | 6.66:1 | AA | Lc -43.5 | Non-text elements, placeholder text |
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
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C7DFDA
oklch(88.4% 0.026 181.8)
-
Step 300
300
#9FCBC2
oklch(80.8% 0.048 181.1)
-
Step 400
400
#66B1A3
oklch(70.8% 0.078 180.6)
-
Step 500
500 (this color)
#37A191
oklch(64.5% 0.099 181.1)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#094D44
oklch(37.9% 0.065 181.2)
-
Step 950
950
#0A2D28
oklch(27.1% 0.041 182)
#37A191 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) | #9A9890 | 0.104 |
| Deuteranopia (no green cones) | #8B8C92 | 0.100 |
| Tritanopia (no blue cones) | #00A49C | 0.020 |
| Achromatopsia (no color) | #919191 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A191
#37A191
oklch(64.5% 0.099 181.1)
- #BF738A
#BF738A
oklch(64.4% 0.099 0.7)
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 #37A191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Persian Green #2A9D8F ΔE 0.015
- Sea #3C9992 ΔE 0.024
- Blue Green #0F9B8E ΔE 0.026
- Dull Teal #5F9E8F ΔE 0.031
- Grey Teal #5E9B8A ΔE 0.031
- Ocean Green #3D9973 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.043
- Dusty Teal #4C9085 ΔE 0.048
Use #37A191 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.