#337F90
Closest named color: Ocean (#017B92). oklch(55.7% 0.078 215), rgb(51, 127, 144).
Aa
White text reads best on this color (4.58:1).
About this color
#337F90 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.078 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.026 away. White text reads best on it, at 4.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #337F90 |
| RGB | rgb(51, 127, 144) |
| HSL | hsl(191, 48%, 38%) |
| OKLCH | oklch(55.7% 0.078 215) |
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 #337F90 | 4.58:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #337F90 | 4.57:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #337F90 text on white | 4.58:1 | AA | Lc 71.6 | Content text, not long reading |
| #337F90 text on black | 4.57:1 | AA | Lc -30.1 | Non-text elements, placeholder text |
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
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A8C7CF
oklch(80.9% 0.035 215.1)
-
Step 400
400
#78AAB7
oklch(70.7% 0.056 215.7)
-
Step 500
500
#5295A5
oklch(63.2% 0.072 215)
-
Step 600
600 (this color)
#337F90
oklch(55.7% 0.078 215)
-
Step 700
700
#246B7A
oklch(49.1% 0.073 214.5)
-
Step 800
800
#205764
oklch(42.6% 0.061 216.1)
-
Step 900
900
#214851
oklch(37.7% 0.047 214.8)
-
Step 950
950
#142A2F
oklch(26.9% 0.029 214)
#337F90 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) | #737B91 | 0.070 |
| Deuteranopia (no green cones) | #657190 | 0.063 |
| Tritanopia (no blue cones) | #008584 | 0.036 |
| Achromatopsia (no color) | #757575 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337F90
#337F90
oklch(55.7% 0.078 215)
- #9C6354
#9C6354
oklch(55.8% 0.078 35.5)
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 #337F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.026
- Cerulean #457B9D ΔE 0.031
- Teal Blue #01889F ΔE 0.031
- Teal #008080 ΔE 0.036
- Stormy Blue #507B9C ΔE 0.037
- Deep Aqua #08787F ΔE 0.040
- Metallic Blue #4F738E ΔE 0.040
- Dark Cyan #008B8B ΔE 0.042
Use #337F90 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.