#37778B
Closest named color: Ocean (#017B92). oklch(53.6% 0.072 221.1), rgb(55, 119, 139).
Aa
White text reads best on this color (5.03:1).
About this color
#37778B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.072 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.025 away. White text reads best on it, at 5.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #37778B |
| RGB | rgb(55, 119, 139) |
| HSL | hsl(194, 43%, 38%) |
| OKLCH | oklch(53.6% 0.072 221.1) |
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 #37778B | 5.03:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #37778B | 4.17:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #37778B text on white | 5.03:1 | AA | Lc 74.6 | Content text, not long reading |
| #37778B text on black | 4.17:1 | AA large text | Lc -27.1 | 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
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#ABC6D0
oklch(81% 0.032 222.1)
-
Step 400
400
#7DA9B8
oklch(70.8% 0.052 220.9)
-
Step 500
500
#5A93A6
oklch(63.1% 0.066 221.3)
-
Step 600
600 (this color)
#37778B
oklch(53.6% 0.072 221.1)
-
Step 700
700
#2F697C
oklch(49% 0.067 222.3)
-
Step 800
800
#285664
oklch(42.7% 0.055 220.3)
-
Step 900
900
#254752
oklch(37.7% 0.044 221)
-
Step 950
950
#172A30
oklch(27.1% 0.027 220)
#37778B 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) | #6B748C | 0.060 |
| Deuteranopia (no green cones) | #5F6B8B | 0.054 |
| Tritanopia (no blue cones) | #007D7D | 0.042 |
| Achromatopsia (no color) | #6F6F6F | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37778B
#37778B
oklch(53.6% 0.072 221.1)
- #915F4C
#915F4C
oklch(53.5% 0.072 41.6)
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 #37778B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.025
- Metallic Blue #4F738E ΔE 0.027
- Sea Blue #047495 ΔE 0.032
- Cerulean #457B9D ΔE 0.033
- Deep Aqua #08787F ΔE 0.033
- Dull Blue #49759C ΔE 0.036
- Stormy Blue #507B9C ΔE 0.039
- Muted Blue #3B719F ΔE 0.041
Use #37778B 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.