#377E8A
Closest named color: Ocean (#017B92). oklch(55.3% 0.073 210.2), rgb(55, 126, 138).
Aa
White text reads best on this color (4.65:1).
About this color
#377E8A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.073 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.029 away. White text reads best on it, at 4.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.51:1 |
| White text | 4.65:1 |
Values
| HEX | #377E8A |
| RGB | rgb(55, 126, 138) |
| HSL | hsl(189, 43%, 38%) |
| OKLCH | oklch(55.3% 0.073 210.2) |
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 #377E8A | 4.65:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #377E8A | 4.51:1 | AA | Lc 32.0 | Non-text elements, placeholder text |
| #377E8A text on white | 4.65:1 | AA | Lc 72.1 | Content text, not long reading |
| #377E8A text on black | 4.51:1 | AA | Lc -29.6 | Dividers and decoration only |
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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A9C7CC
oklch(80.9% 0.033 208.8)
-
Step 400
400
#7AAAB3
oklch(70.7% 0.053 210.4)
-
Step 500
500
#5695A0
oklch(63.2% 0.067 209.9)
-
Step 600
600 (this color)
#377E8A
oklch(55.3% 0.073 210.2)
-
Step 700
700
#2A6B76
oklch(49.1% 0.067 210.4)
-
Step 800
800
#245760
oklch(42.6% 0.056 210.8)
-
Step 900
900
#23484E
oklch(37.7% 0.043 209.1)
-
Step 950
950
#152A2E
oklch(26.9% 0.028 211.1)
#377E8A 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) | #747A8B | 0.069 |
| Deuteranopia (no green cones) | #67708A | 0.063 |
| Tritanopia (no blue cones) | #008382 | 0.032 |
| Achromatopsia (no color) | #747474 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377E8A
#377E8A
oklch(55.3% 0.073 210.2)
- #986259
#986259
oklch(55.2% 0.072 29.9)
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 #377E8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.029
- Teal #008080 ΔE 0.031
- Deep Aqua #08787F ΔE 0.036
- Cerulean #457B9D ΔE 0.037
- Teal Blue #01889F ΔE 0.039
- Bluegreen #017A79 ΔE 0.040
- Metallic Blue #4F738E ΔE 0.040
- Dark Cyan #008B8B ΔE 0.042
Use #377E8A 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.