#37679D
Closest named color: Dusky Blue (#475F94). oklch(50.6% 0.101 252.8), rgb(55, 103, 157).
Aa
White text reads best on this color (5.85:1).
About this color
#37679D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.101 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.027 away. White text reads best on it, at 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #37679D |
| RGB | rgb(55, 103, 157) |
| HSL | hsl(212, 48%, 42%) |
| OKLCH | oklch(50.6% 0.101 252.8) |
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 #37679D | 5.85:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #37679D | 3.58:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #37679D text on white | 5.85:1 | AA | Lc 79.1 | Fine for body text |
| #37679D text on black | 3.58:1 | AA large text | Lc -22.7 | 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
#7EA4D1
oklch(70.8% 0.078 253.1)
-
Step 500
500
#5C8DC5
oklch(63.2% 0.1 252.7)
-
Step 600
600
#4176B1
oklch(55.6% 0.108 252.6)
-
Step 700
700 (this color)
#37679D
oklch(50.6% 0.101 252.8)
-
Step 800
800
#2B517C
oklch(42.8% 0.084 252.9)
-
Step 900
900
#274363
oklch(37.6% 0.065 252.8)
-
Step 950
950
#17273A
oklch(26.8% 0.042 253.5)
#37679D 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) | #506A9F | 0.030 |
| Deuteranopia (no green cones) | #42609C | 0.021 |
| Tritanopia (no blue cones) | #00737B | 0.080 |
| Achromatopsia (no color) | #656565 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37679D
#37679D
oklch(50.6% 0.101 252.8)
- #885A11
#885A11
oklch(50.6% 0.102 72.3)
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 #37679D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.027
- Denim #3B638C ΔE 0.027
- Muted Blue #3B719F ΔE 0.030
- French Blue #436BAD ΔE 0.030
- Peacock Blue #016795 ΔE 0.033
- Mid Blue #276AB3 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.035
- Ocean Blue #03719C ΔE 0.037
Use #37679D 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.