#337A8B
Closest named color: Ocean (#017B92). oklch(54.2% 0.075 216.1), rgb(51, 122, 139).
Aa
White text reads best on this color (4.88:1).
About this color
#337A8B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.075 and its hue 216°. 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 4.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.29:1 |
| White text | 4.88:1 |
Values
| HEX | #337A8B |
| RGB | rgb(51, 122, 139) |
| HSL | hsl(192, 46%, 37%) |
| OKLCH | oklch(54.2% 0.075 216.1) |
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 #337A8B | 4.88:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #337A8B | 4.29:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #337A8B text on white | 4.88:1 | AA | Lc 73.7 | Content text, not long reading |
| #337A8B text on black | 4.29:1 | AA large text | Lc -28.0 | 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
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDCE1
oklch(88.4% 0.019 218.4)
-
Step 300
300
#A9C7CF
oklch(81% 0.034 215.6)
-
Step 400
400
#7AAAB6
oklch(70.8% 0.054 214.9)
-
Step 500
500
#5694A4
oklch(63.1% 0.068 216.2)
-
Step 600
600 (this color)
#337A8B
oklch(54.2% 0.075 216.1)
-
Step 700
700
#296A7A
oklch(49% 0.07 216.8)
-
Step 800
800
#245763
oklch(42.7% 0.057 215.6)
-
Step 900
900
#234851
oklch(37.8% 0.045 215.5)
-
Step 950
950
#152A2F
oklch(27% 0.028 214.7)
#337A8B 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) | #6E768C | 0.066 |
| Deuteranopia (no green cones) | #616D8B | 0.059 |
| Tritanopia (no blue cones) | #00807F | 0.037 |
| Achromatopsia (no color) | #717171 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337A8B
#337A8B
oklch(54.2% 0.075 216.1)
- #955F50
#955F50
oklch(54.1% 0.075 36.3)
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 #337A8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.021
- Deep Aqua #08787F ΔE 0.030
- Metallic Blue #4F738E ΔE 0.033
- Cerulean #457B9D ΔE 0.034
- Sea Blue #047495 ΔE 0.036
- Teal #008080 ΔE 0.036
- Bluegreen #017A79 ΔE 0.039
- Dull Blue #49759C ΔE 0.041
Use #337A8B 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.