#337398
Closest named color: Muted Blue (#3B719F). oklch(53% 0.087 237), rgb(51, 115, 152).
Aa
White text reads best on this color (5.18:1).
About this color
#337398 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.087 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.016 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #337398 |
| RGB | rgb(51, 115, 152) |
| HSL | hsl(202, 50%, 40%) |
| OKLCH | oklch(53% 0.087 237) |
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 #337398 | 5.18:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #337398 | 4.04:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #337398 text on white | 5.18:1 | AA | Lc 75.5 | Fine for body text |
| #337398 text on black | 4.04:1 | AA large text | Lc -26.2 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#AAC5D7
oklch(80.9% 0.039 237.2)
-
Step 400
400
#7BA7C3
oklch(70.7% 0.063 236.7)
-
Step 500
500
#5891B4
oklch(63.1% 0.08 236.9)
-
Step 600
600 (this color)
#337398
oklch(53% 0.087 237)
-
Step 700
700
#2D6789
oklch(49.1% 0.081 237.4)
-
Step 800
800
#26546F
oklch(42.6% 0.067 237.1)
-
Step 900
900
#24465A
oklch(37.8% 0.052 236.3)
-
Step 950
950
#162935
oklch(27.1% 0.033 237.5)
#337398 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) | #62729A | 0.052 |
| Deuteranopia (no green cones) | #546897 | 0.043 |
| Tritanopia (no blue cones) | #007D80 | 0.060 |
| Achromatopsia (no color) | #6D6D6D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337398
#337398
oklch(53% 0.087 237)
- #925E36
#925E36
oklch(53% 0.088 57)
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 #337398, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.016
- Sea Blue #047495 ΔE 0.023
- Dull Blue #49759C ΔE 0.023
- Ocean Blue #03719C ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.028
- Metallic Blue #4F738E ΔE 0.030
- Cerulean #457B9D ΔE 0.031
- Ocean #017B92 ΔE 0.034
Use #337398 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.