#37649E
Closest named color: Dusky Blue (#475F94). oklch(49.9% 0.106 255.6), rgb(55, 100, 158).
Aa
White text reads best on this color (6.03:1).
About this color
#37649E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.106 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.024 away. White text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.47:1 |
| White text | 6.03:1 |
Values
| HEX | #37649E |
| RGB | rgb(55, 100, 158) |
| HSL | hsl(214, 48%, 42%) |
| OKLCH | oklch(49.9% 0.106 255.6) |
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 #37649E | 6.03:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #37649E | 3.47:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #37649E text on white | 6.03:1 | AA | Lc 79.9 | Fine for body text |
| #37649E text on black | 3.47:1 | AA large text | Lc -21.9 | 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
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ABC3E2
oklch(80.9% 0.051 254.9)
-
Step 400
400
#7EA3D3
oklch(70.6% 0.082 255.2)
-
Step 500
500
#5D8BC8
oklch(63% 0.105 255.8)
-
Step 600
600
#4375B5
oklch(55.7% 0.114 255.4)
-
Step 700
700 (this color)
#37649E
oklch(49.9% 0.106 255.6)
-
Step 800
800
#2C507E
oklch(42.7% 0.087 255.4)
-
Step 900
900
#284365
oklch(37.8% 0.067 254.9)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#37649E 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) | #4B68A0 | 0.027 |
| Deuteranopia (no green cones) | #3C5E9D | 0.017 |
| Tritanopia (no blue cones) | #007179 | 0.086 |
| Achromatopsia (no color) | #636363 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37649E
#37649E
oklch(49.9% 0.106 255.6)
- #855900
#855900
oklch(49.9% 0.105 75.6)
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 #37649E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.024
- Denim #3B638C ΔE 0.029
- Denim Blue #3B5B92 ΔE 0.029
- French Blue #436BAD ΔE 0.033
- Peacock Blue #016795 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.035
- Muted Blue #3B719F ΔE 0.039
- Ocean Blue #03719C ΔE 0.044
Use #37649E 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.