#37669B
Closest named color: Denim (#3B638C). oklch(50.2% 0.1 252.9), rgb(55, 102, 155).
Aa
White text reads best on this color (5.93:1).
About this color
#37669B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.100 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.024 away. White text reads best on it, at 5.93:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #37669B |
| RGB | rgb(55, 102, 155) |
| HSL | hsl(212, 48%, 41%) |
| OKLCH | oklch(50.2% 0.1 252.9) |
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 #37669B | 5.93:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #37669B | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #37669B text on white | 5.93:1 | AA | Lc 79.5 | Fine for body text |
| #37669B text on black | 3.53:1 | AA large text | Lc -22.3 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEB
oklch(88.6% 0.027 251.7)
-
Step 300
300
#ABC3E0
oklch(80.9% 0.049 253.3)
-
Step 400
400
#7EA4D0
oklch(70.7% 0.077 252.5)
-
Step 500
500
#5D8DC4
oklch(63.2% 0.098 252.7)
-
Step 600
600
#4276B0
oklch(55.6% 0.107 252.5)
-
Step 700
700 (this color)
#37669B
oklch(50.2% 0.1 252.9)
-
Step 800
800
#2C517B
oklch(42.8% 0.082 252.9)
-
Step 900
900
#284363
oklch(37.7% 0.064 253.6)
-
Step 950
950
#18273A
oklch(26.9% 0.041 254.8)
#37669B 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) | #4F699D | 0.030 |
| Deuteranopia (no green cones) | #415F9A | 0.021 |
| Tritanopia (no blue cones) | #007279 | 0.080 |
| Achromatopsia (no color) | #646464 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37669B
#37669B
oklch(50.2% 0.1 252.9)
- #865913
#865913
oklch(50.1% 0.099 72.2)
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 #37669B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.024
- Dusky Blue #475F94 ΔE 0.025
- Peacock Blue #016795 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.032
- Muted Blue #3B719F ΔE 0.033
- French Blue #436BAD ΔE 0.034
- Ocean Blue #03719C ΔE 0.038
- Mid Blue #276AB3 ΔE 0.038
Use #37669B 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.