#37549B
Closest named color: Denim Blue (#3B5B92). oklch(46.1% 0.12 265.3), rgb(55, 84, 155).
Aa
White text reads best on this color (7.23:1).
About this color
#37549B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.120 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.028 away. White text reads best on it, at 7.23:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.90:1 |
| White text | 7.23:1 |
Values
| HEX | #37549B |
| RGB | rgb(55, 84, 155) |
| HSL | hsl(223, 48%, 41%) |
| OKLCH | oklch(46.1% 0.12 265.3) |
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 #37549B | 7.23:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #37549B | 2.90:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #37549B text on white | 7.23:1 | AAA | Lc 84.9 | Fine for body text |
| #37549B text on black | 2.90:1 | Fails | Lc -17.1 | 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 700.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AEC1E7
oklch(80.9% 0.058 264.2)
-
Step 400
400
#84A0DB
oklch(70.7% 0.092 264.6)
-
Step 500
500
#6687D2
oklch(63.1% 0.12 265.2)
-
Step 600
600
#4E6FBF
oklch(55.6% 0.13 265.5)
-
Step 700
700 (this color)
#37549B
oklch(46.1% 0.12 265.3)
-
Step 800
800
#344C85
oklch(42.7% 0.099 265.2)
-
Step 900
900
#2D406B
oklch(37.7% 0.078 264.9)
-
Step 950
950
#1B263F
oklch(27.2% 0.049 265.2)
#37549B 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) | #325C9E | 0.022 |
| Deuteranopia (no green cones) | #22539A | 0.021 |
| Tritanopia (no blue cones) | #006470 | 0.101 |
| Achromatopsia (no color) | #575757 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37549B
#37549B
oklch(46.1% 0.12 265.3)
- #705300
#705300
oklch(46% 0.094 85.1)
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 #37549B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.028
- Dusk Blue #26538D ΔE 0.030
- Twilight #4E518B ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.042
- Cobalt #1E488F ΔE 0.049
- Dusk #4E5481 ΔE 0.051
- Blueberry #464196 ΔE 0.051
Use #37549B 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.