#377B8D
Closest named color: Ocean (#017B92). oklch(54.7% 0.074 217.8), rgb(55, 123, 141).
Aa
White text reads best on this color (4.79:1).
About this color
#377B8D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.074 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.024 away. White text reads best on it, at 4.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.38:1 |
| White text | 4.79:1 |
Values
| HEX | #377B8D |
| RGB | rgb(55, 123, 141) |
| HSL | hsl(193, 44%, 38%) |
| OKLCH | oklch(54.7% 0.074 217.8) |
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 #377B8D | 4.79:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #377B8D | 4.38:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #377B8D text on white | 4.79:1 | AA | Lc 73.1 | Content text, not long reading |
| #377B8D text on black | 4.38:1 | AA large text | Lc -28.6 | 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
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CCDCE1
oklch(88.4% 0.019 218.4)
-
Step 300
300
#AAC6CF
oklch(80.9% 0.033 219.2)
-
Step 400
400
#7BA9B7
oklch(70.7% 0.053 218.6)
-
Step 500
500
#5794A5
oklch(63.2% 0.068 217.7)
-
Step 600
600 (this color)
#377B8D
oklch(54.7% 0.074 217.8)
-
Step 700
700
#2C6A7A
oklch(49.1% 0.068 217.5)
-
Step 800
800
#265764
oklch(42.9% 0.057 217.7)
-
Step 900
900
#244751
oklch(37.6% 0.044 218.5)
-
Step 950
950
#162A2F
oklch(27% 0.027 215.5)
#377B8D 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) | #6F788E | 0.063 |
| Deuteranopia (no green cones) | #636E8D | 0.058 |
| Tritanopia (no blue cones) | #008181 | 0.038 |
| Achromatopsia (no color) | #727272 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377B8D
#377B8D
oklch(54.7% 0.074 217.8)
- #966151
#966151
oklch(54.6% 0.074 37.5)
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 #377B8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.024
- Cerulean #457B9D ΔE 0.030
- Metallic Blue #4F738E ΔE 0.032
- Deep Aqua #08787F ΔE 0.036
- Stormy Blue #507B9C ΔE 0.036
- Dull Blue #49759C ΔE 0.038
- Teal #008080 ΔE 0.038
- Sea Blue #047495 ΔE 0.038
Use #377B8D 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.