#37669D
Closest named color: Dusky Blue (#475F94). oklch(50.3% 0.102 253.7), rgb(55, 102, 157).
Aa
White text reads best on this color (5.91:1).
About this color
#37669D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.102 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.025 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.54:1 |
| White text | 5.91:1 |
Values
| HEX | #37669D |
| RGB | rgb(55, 102, 157) |
| HSL | hsl(212, 48%, 42%) |
| OKLCH | oklch(50.3% 0.102 253.7) |
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 #37669D | 5.91:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #37669D | 3.54:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #37669D text on white | 5.91:1 | AA | Lc 79.4 | Fine for body text |
| #37669D text on black | 3.54:1 | AA large text | Lc -22.4 | 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
#ABC3E1
oklch(80.9% 0.05 254.1)
-
Step 400
400
#7EA4D1
oklch(70.8% 0.078 253.1)
-
Step 500
500
#5D8CC5
oklch(63.1% 0.101 253.9)
-
Step 600
600
#4275B2
oklch(55.5% 0.11 254)
-
Step 700
700 (this color)
#37669D
oklch(50.3% 0.102 253.7)
-
Step 800
800
#2B507C
oklch(42.6% 0.085 253.9)
-
Step 900
900
#274364
oklch(37.7% 0.066 253.5)
-
Step 950
950
#17273A
oklch(26.8% 0.042 253.5)
#37669D 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) | #4E699F | 0.028 |
| Deuteranopia (no green cones) | #40609C | 0.018 |
| Tritanopia (no blue cones) | #00737A | 0.083 |
| Achromatopsia (no color) | #646464 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37669D
#37669D
oklch(50.3% 0.102 253.7)
- #875A0D
#875A0D
oklch(50.4% 0.102 73.6)
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 #37669D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.025
- Denim #3B638C ΔE 0.027
- French Blue #436BAD ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.033
- Muted Blue #3B719F ΔE 0.033
- Peacock Blue #016795 ΔE 0.033
- Mid Blue #276AB3 ΔE 0.035
- Ocean Blue #03719C ΔE 0.039
Use #37669D 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.