#37778F
Closest named color: Ocean (#017B92). oklch(53.7% 0.075 225.4), rgb(55, 119, 143).
Aa
White text reads best on this color (5.00:1).
About this color
#37778F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.075 and its hue 225°. 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 5.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #37778F |
| RGB | rgb(55, 119, 143) |
| HSL | hsl(196, 44%, 39%) |
| OKLCH | oklch(53.7% 0.075 225.4) |
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 #37778F | 5.00:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #37778F | 4.19:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #37778F text on white | 5.00:1 | AA | Lc 74.4 | Content text, not long reading |
| #37778F text on black | 4.19:1 | AA large text | Lc -27.3 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#AAC6D1
oklch(80.9% 0.034 223.5)
-
Step 400
400
#7CA8BA
oklch(70.6% 0.054 225.1)
-
Step 500
500
#5993A9
oklch(63.2% 0.069 224.3)
-
Step 600
600 (this color)
#37778F
oklch(53.7% 0.075 225.4)
-
Step 700
700
#2E697F
oklch(49.1% 0.07 225.5)
-
Step 800
800
#285667
oklch(42.8% 0.057 224.8)
-
Step 900
900
#254754
oklch(37.8% 0.045 224.9)
-
Step 950
950
#162931
oklch(26.8% 0.029 226.7)
#37778F 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) | #6A7590 | 0.058 |
| Deuteranopia (no green cones) | #5D6B8F | 0.051 |
| Tritanopia (no blue cones) | #007E7F | 0.046 |
| Achromatopsia (no color) | #6F6F6F | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37778F
#37778F
oklch(53.7% 0.075 225.4)
- #926048
#926048
oklch(53.7% 0.075 46.3)
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 #37778F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.024
- Metallic Blue #4F738E ΔE 0.025
- Cerulean #457B9D ΔE 0.028
- Sea Blue #047495 ΔE 0.029
- Dull Blue #49759C ΔE 0.030
- Stormy Blue #507B9C ΔE 0.035
- Muted Blue #3B719F ΔE 0.035
- Deep Aqua #08787F ΔE 0.038
Use #37778F 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.