#337B91
Closest named color: Ocean (#017B92). oklch(54.7% 0.079 221.2), rgb(51, 123, 145).
Aa
White text reads best on this color (4.79:1).
About this color
#337B91 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.079 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.021 away. White text reads best on it, at 4.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.38:1 |
| White text | 4.79:1 |
Values
| HEX | #337B91 |
| RGB | rgb(51, 123, 145) |
| HSL | hsl(194, 48%, 38%) |
| OKLCH | oklch(54.7% 0.079 221.2) |
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 #337B91 | 4.79:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #337B91 | 4.38:1 | AA large text | Lc 31.1 | Non-text elements, placeholder text |
| #337B91 text on white | 4.79:1 | AA | Lc 73.0 | Content text, not long reading |
| #337B91 text on black | 4.38:1 | AA large text | Lc -28.7 | 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
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#A9C6D1
oklch(80.9% 0.035 222.7)
-
Step 400
400
#79A9BA
oklch(70.7% 0.057 221.9)
-
Step 500
500
#5494A8
oklch(63.1% 0.072 220.2)
-
Step 600
600 (this color)
#337B91
oklch(54.7% 0.079 221.2)
-
Step 700
700
#286A7E
oklch(49.1% 0.073 221.3)
-
Step 800
800
#235666
oklch(42.6% 0.06 221.6)
-
Step 900
900
#224753
oklch(37.6% 0.047 221.5)
-
Step 950
950
#152A31
oklch(27.1% 0.03 221.5)
#337B91 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) | #6E7892 | 0.065 |
| Deuteranopia (no green cones) | #606E91 | 0.057 |
| Tritanopia (no blue cones) | #008282 | 0.042 |
| Achromatopsia (no color) | #727272 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337B91
#337B91
oklch(54.7% 0.079 221.2)
- #98614C
#98614C
oklch(54.7% 0.079 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 #337B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.021
- Cerulean #457B9D ΔE 0.026
- Metallic Blue #4F738E ΔE 0.032
- Sea Blue #047495 ΔE 0.034
- Stormy Blue #507B9C ΔE 0.034
- Dull Blue #49759C ΔE 0.034
- Deep Aqua #08787F ΔE 0.038
- Teal Blue #01889F ΔE 0.039
Use #337B91 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.