#373677
Closest named color: Dark Slate Blue (#483D8B). oklch(37.1% 0.108 280.4), rgb(55, 54, 119).
Aa
White text reads best on this color (10.73:1).
About this color
#373677 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.108 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.73:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.73:1 |
Values
| HEX | #373677 |
| RGB | rgb(55, 54, 119) |
| HSL | hsl(241, 38%, 34%) |
| OKLCH | oklch(37.1% 0.108 280.4) |
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 #373677 | 10.73:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #373677 | 1.95:1 | Fails | Lc 9.3 | Not readable |
| #373677 text on white | 10.73:1 | AAA | Lc 94.7 | Preferred for body text |
| #373677 text on black | 1.95:1 | Fails | Lc -7.9 | Not readable |
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 900.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FA
oklch(93.5% 0.024 280.9)
-
Step 200
200
#D3D6F7
oklch(88.4% 0.045 281.3)
-
Step 300
300
#B6BBF5
oklch(80.8% 0.082 280.6)
-
Step 400
400
#9296F0
oklch(70.7% 0.131 280.6)
-
Step 500
500
#7979EA
oklch(63% 0.166 280.5)
-
Step 600
600
#645FD8
oklch(55.5% 0.18 280.6)
-
Step 700
700
#534EBC
oklch(49.2% 0.168 280.3)
-
Step 800
800
#444098
oklch(42.6% 0.14 280.7)
-
Step 900
900 (this color)
#373677
oklch(37.1% 0.108 280.4)
-
Step 950
950
#212147
oklch(27% 0.069 280.7)
#373677 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) | #144079 | 0.045 |
| Deuteranopia (no green cones) | #0C3B76 | 0.047 |
| Tritanopia (no blue cones) | #1D4451 | 0.092 |
| Achromatopsia (no color) | #3E3E3E | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373677
#373677
oklch(37.1% 0.108 280.4)
- #494000
#494000
oklch(36.9% 0.077 100.3)
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 #373677, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.053
- Marine Blue #01386A ΔE 0.060
- Cobalt #1E488F ΔE 0.062
- Blueberry #464196 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.068
- Light Navy #155084 ΔE 0.076
- Dark Grey Blue #29465B ΔE 0.077
Use #373677 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.