#377A7D
Closest named color: Deep Aqua (#08787F). oklch(53.8% 0.068 199.3), rgb(55, 122, 125).
Aa
White text reads best on this color (4.95:1).
About this color
#377A7D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.068 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.025 away. White text reads best on it, at 4.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 4.24:1 |
| White text | 4.95:1 |
Values
| HEX | #377A7D |
| RGB | rgb(55, 122, 125) |
| HSL | hsl(183, 39%, 35%) |
| OKLCH | oklch(53.8% 0.068 199.3) |
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 #377A7D | 4.95:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #377A7D | 4.24:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #377A7D text on white | 4.95:1 | AA | Lc 74.1 | Content text, not long reading |
| #377A7D text on black | 4.24:1 | AA large text | Lc -27.6 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CDDDDD
oklch(88.6% 0.017 196.8)
-
Step 300
300
#ABC7C8
oklch(80.9% 0.03 199.2)
-
Step 400
400
#7DAAAC
oklch(70.6% 0.048 199.6)
-
Step 500
500
#5A9598
oklch(63.1% 0.062 199.9)
-
Step 600
600 (this color)
#377A7D
oklch(53.8% 0.068 199.3)
-
Step 700
700
#2E6C6E
oklch(49.2% 0.063 198.2)
-
Step 800
800
#28585A
oklch(42.8% 0.052 199)
-
Step 900
900
#25484A
oklch(37.6% 0.041 200.4)
-
Step 950
950
#172A2B
oklch(26.9% 0.025 200)
#377A7D 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) | #72757D | 0.069 |
| Deuteranopia (no green cones) | #676C7D | 0.065 |
| Tritanopia (no blue cones) | #007E7B | 0.026 |
| Achromatopsia (no color) | #707070 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377A7D
#377A7D
oklch(53.8% 0.068 199.3)
- #915E5E
#915E5E
oklch(53.7% 0.067 19.5)
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 #377A7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.025
- Teal #008080 ΔE 0.026
- Bluegreen #017A79 ΔE 0.027
- Ocean #017B92 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.039
- Dark Aquamarine #017371 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.046
- Dark Cyan #008B8B ΔE 0.050
Use #377A7D 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.