#337391
Closest named color: Sea Blue (#047495). oklch(52.7% 0.08 231.4), rgb(51, 115, 145).
Aa
White text reads best on this color (5.24:1).
About this color
#337391 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.080 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.021 away. White text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #337391 |
| RGB | rgb(51, 115, 145) |
| HSL | hsl(199, 48%, 38%) |
| OKLCH | oklch(52.7% 0.08 231.4) |
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 #337391 | 5.24:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #337391 | 4.00:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #337391 text on white | 5.24:1 | AA | Lc 75.8 | Fine for body text |
| #337391 text on black | 4.00:1 | AA large text | Lc -25.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#AAC5D4
oklch(80.8% 0.036 232.2)
-
Step 400
400
#7CA8BF
oklch(70.8% 0.058 231.4)
-
Step 500
500
#5992AE
oklch(63.2% 0.073 230.8)
-
Step 600
600 (this color)
#337391
oklch(52.7% 0.08 231.4)
-
Step 700
700
#2E6884
oklch(49.1% 0.075 232.1)
-
Step 800
800
#27556B
oklch(42.7% 0.062 231.5)
-
Step 900
900
#254657
oklch(37.7% 0.048 232.5)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#337391 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) | #647192 | 0.054 |
| Deuteranopia (no green cones) | #576891 | 0.047 |
| Tritanopia (no blue cones) | #007B7D | 0.051 |
| Achromatopsia (no color) | #6C6C6C | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337391
#337391
oklch(52.7% 0.08 231.4)
- #905D3E
#905D3E
oklch(52.7% 0.081 51.5)
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 #337391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.021
- Muted Blue #3B719F ΔE 0.026
- Metallic Blue #4F738E ΔE 0.027
- Ocean #017B92 ΔE 0.029
- Ocean Blue #03719C ΔE 0.029
- Dull Blue #49759C ΔE 0.029
- Cerulean #457B9D ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.039
Use #337391 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.