#37589B
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.115 263), rgb(55, 88, 155).
Aa
White text reads best on this color (6.92:1).
About this color
#37589B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.115 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.019 away. White text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #37589B |
| RGB | rgb(55, 88, 155) |
| HSL | hsl(220, 48%, 41%) |
| OKLCH | oklch(47% 0.115 263) |
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 #37589B | 6.92:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #37589B | 3.03:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #37589B text on white | 6.92:1 | AA | Lc 83.7 | Fine for body text |
| #37589B text on black | 3.03:1 | AA large text | Lc -18.2 | 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 700.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#AEC1E6
oklch(80.9% 0.056 263.7)
-
Step 400
400
#83A1D9
oklch(70.8% 0.089 262.5)
-
Step 500
500
#6488CF
oklch(63.1% 0.115 263)
-
Step 600
600
#4C71BC
oklch(55.7% 0.124 263.1)
-
Step 700
700 (this color)
#37589B
oklch(47% 0.115 263)
-
Step 800
800
#324D83
oklch(42.7% 0.096 262.9)
-
Step 900
900
#2C4169
oklch(37.8% 0.074 262.4)
-
Step 950
950
#1A263E
oklch(27% 0.048 263.3)
#37589B 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) | #395F9E | 0.020 |
| Deuteranopia (no green cones) | #2A559A | 0.017 |
| Tritanopia (no blue cones) | #006772 | 0.096 |
| Achromatopsia (no color) | #5A5A5A | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37589B
#37589B
oklch(47% 0.115 263)
- #755500
#755500
oklch(47.1% 0.097 83.2)
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 #37589B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.019
- Dusk Blue #26538D ΔE 0.033
- Dusky Blue #475F94 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.035
- Twilight #4E518B ΔE 0.039
- Denim #3B638C ΔE 0.045
- Dusk #4E5481 ΔE 0.049
- Peacock Blue #016795 ΔE 0.052
Use #37589B 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.