#337C90
Closest named color: Ocean (#017B92). oklch(54.9% 0.078 218.9), rgb(51, 124, 144).
Aa
White text reads best on this color (4.74:1).
About this color
#337C90 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.078 and its hue 219°. 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 4.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #337C90 |
| RGB | rgb(51, 124, 144) |
| HSL | hsl(193, 48%, 38%) |
| OKLCH | oklch(54.9% 0.078 218.9) |
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 #337C90 | 4.74:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #337C90 | 4.42:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #337C90 text on white | 4.74:1 | AA | Lc 72.7 | Content text, not long reading |
| #337C90 text on black | 4.42:1 | AA large text | Lc -29.0 | 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
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#A8C7D0
oklch(81% 0.036 217.2)
-
Step 400
400
#79A9B8
oklch(70.6% 0.056 219.2)
-
Step 500
500
#5494A7
oklch(63.1% 0.072 219.1)
-
Step 600
600 (this color)
#337C90
oklch(54.9% 0.078 218.9)
-
Step 700
700
#276A7C
oklch(49% 0.072 218.8)
-
Step 800
800
#225765
oklch(42.8% 0.06 218.1)
-
Step 900
900
#224852
oklch(37.8% 0.046 217.1)
-
Step 950
950
#152A30
oklch(27% 0.029 218.2)
#337C90 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) | #6F7991 | 0.066 |
| Deuteranopia (no green cones) | #626F90 | 0.059 |
| Tritanopia (no blue cones) | #008382 | 0.041 |
| Achromatopsia (no color) | #737373 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337C90
#337C90
oklch(54.9% 0.078 218.9)
- #99614F
#99614F
oklch(54.9% 0.078 38.6)
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 #337C90, 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 0.028
- Metallic Blue #4F738E ΔE 0.034
- Stormy Blue #507B9C ΔE 0.035
- Sea Blue #047495 ΔE 0.037
- Deep Aqua #08787F ΔE 0.037
- Teal Blue #01889F ΔE 0.037
- Dull Blue #49759C ΔE 0.037
Use #337C90 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.