#37839B
Closest named color: Teal Blue (#01889F). oklch(57.3% 0.083 221.9), rgb(55, 131, 155).
Aa
Black text reads best on this color (4.88:1).
About this color
#37839B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.083 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.023 away. Black text reads best on it, at 4.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.88:1 |
| White text | 4.30:1 |
Values
| HEX | #37839B |
| RGB | rgb(55, 131, 155) |
| HSL | hsl(194, 48%, 41%) |
| OKLCH | oklch(57.3% 0.083 221.9) |
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 #37839B | 4.30:1 | AA large text | Lc -75.0 | Fine for body text |
| Black text on #37839B | 4.88:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #37839B text on white | 4.30:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #37839B text on black | 4.88:1 | AA | Lc -32.1 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CBDDE3
oklch(88.6% 0.021 219.7)
-
Step 300
300
#A7C7D2
oklch(81% 0.038 220.6)
-
Step 400
400
#77A9BB
oklch(70.6% 0.059 222.4)
-
Step 500
500
#5194AA
oklch(63.1% 0.076 221.5)
-
Step 600
600 (this color)
#37839B
oklch(57.3% 0.083 221.9)
-
Step 700
700
#236A80
oklch(49.1% 0.077 222.5)
-
Step 800
800
#1F5768
oklch(42.8% 0.064 221.4)
-
Step 900
900
#204854
oklch(37.8% 0.049 220.1)
-
Step 950
950
#142A31
oklch(27% 0.031 220.6)
#37839B 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) | #75809C | 0.067 |
| Deuteranopia (no green cones) | #67759B | 0.061 |
| Tritanopia (no blue cones) | #008B8B | 0.045 |
| Achromatopsia (no color) | #7A7A7A | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37839B
#37839B
oklch(57.3% 0.083 221.9)
- #A26751
#A26751
oklch(57.2% 0.083 41.2)
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 #37839B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.023
- Cerulean #457B9D ΔE 0.026
- Stormy Blue #507B9C ΔE 0.031
- Blue NCS #118AB2 ΔE 0.037
- Ocean #017B92 ΔE 0.038
- Dull Blue #49759C ΔE 0.043
- Off Blue #5684AE ΔE 0.044
- Steel Blue #4682B4 ΔE 0.044
Use #37839B 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.