#377B83
Closest named color: Deep Aqua (#08787F). oklch(54.3% 0.069 205.7), rgb(55, 123, 131).
Aa
White text reads best on this color (4.85:1).
About this color
#377B83 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.069 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.028 away. White text reads best on it, at 4.85:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 4.32:1 |
| White text | 4.85:1 |
Values
| HEX | #377B83 |
| RGB | rgb(55, 123, 131) |
| HSL | hsl(186, 41%, 36%) |
| OKLCH | oklch(54.3% 0.069 205.7) |
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 #377B83 | 4.85:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #377B83 | 4.32:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #377B83 text on white | 4.85:1 | AA | Lc 73.5 | Content text, not long reading |
| #377B83 text on black | 4.32:1 | AA large text | Lc -28.2 | 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
#CDDDDF
oklch(88.6% 0.017 205.8)
-
Step 300
300
#AAC7CA
oklch(80.9% 0.032 204.2)
-
Step 400
400
#7CAAB0
oklch(70.7% 0.05 206.2)
-
Step 500
500
#58959C
oklch(63.1% 0.064 205.1)
-
Step 600
600 (this color)
#377B83
oklch(54.3% 0.069 205.7)
-
Step 700
700
#2D6B72
oklch(49% 0.064 205.4)
-
Step 800
800
#27575D
oklch(42.6% 0.053 206.3)
-
Step 900
900
#25484C
oklch(37.7% 0.041 205.1)
-
Step 950
950
#162A2D
oklch(26.9% 0.026 207.9)
#377B83 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) | #727684 | 0.069 |
| Deuteranopia (no green cones) | #666E83 | 0.062 |
| Tritanopia (no blue cones) | #00807D | 0.031 |
| Achromatopsia (no color) | #717171 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377B83
#377B83
oklch(54.3% 0.069 205.7)
- #945F5A
#945F5A
oklch(54.2% 0.07 25.5)
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 #377B83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.028
- Teal #008080 ΔE 0.028
- Ocean #017B92 ΔE 0.031
- Bluegreen #017A79 ΔE 0.032
- Metallic Blue #4F738E ΔE 0.041
- Deep Turquoise #017374 ΔE 0.044
- Cerulean #457B9D ΔE 0.045
- Dark Aquamarine #017371 ΔE 0.047
Use #377B83 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.