#337F8D
Closest named color: Ocean (#017B92). oklch(55.5% 0.077 211.7), rgb(51, 127, 141).
Aa
White text reads best on this color (4.60:1).
About this color
#337F8D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.077 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.027 away. White text reads best on it, at 4.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #337F8D |
| RGB | rgb(51, 127, 141) |
| HSL | hsl(189, 47%, 38%) |
| OKLCH | oklch(55.5% 0.077 211.7) |
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 #337F8D | 4.60:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #337F8D | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #337F8D text on white | 4.60:1 | AA | Lc 71.7 | Content text, not long reading |
| #337F8D text on black | 4.56:1 | AA | Lc -29.9 | 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
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A8C7CE
oklch(80.9% 0.035 212.9)
-
Step 400
400
#78AAB5
oklch(70.7% 0.055 212.8)
-
Step 500
500
#5295A2
oklch(63.1% 0.071 211.6)
-
Step 600
600 (this color)
#337F8D
oklch(55.5% 0.077 211.7)
-
Step 700
700
#256B78
oklch(49% 0.071 212.2)
-
Step 800
800
#215862
oklch(42.9% 0.059 211.5)
-
Step 900
900
#214850
oklch(37.7% 0.046 212.7)
-
Step 950
950
#142A2F
oklch(26.9% 0.029 214)
#337F8D 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) | #747B8E | 0.072 |
| Deuteranopia (no green cones) | #66718D | 0.064 |
| Tritanopia (no blue cones) | #008583 | 0.034 |
| Achromatopsia (no color) | #757575 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337F8D
#337F8D
oklch(55.5% 0.077 211.7)
- #9B6257
#9B6257
oklch(55.6% 0.077 31.5)
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 #337F8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.027
- Teal #008080 ΔE 0.032
- Teal Blue #01889F ΔE 0.034
- Cerulean #457B9D ΔE 0.036
- Deep Aqua #08787F ΔE 0.037
- Dark Cyan #008B8B ΔE 0.040
- Stormy Blue #507B9C ΔE 0.041
- Metallic Blue #4F738E ΔE 0.042
Use #337F8D 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.