#373785
Closest named color: Dark Slate Blue (#483D8B). oklch(38.4% 0.127 278.5), rgb(55, 55, 133).
Aa
White text reads best on this color (10.25:1).
About this color
#373785 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.127 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.035 away. White text reads best on it, at 10.25:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #373785 |
| RGB | rgb(55, 55, 133) |
| HSL | hsl(240, 41%, 37%) |
| OKLCH | oklch(38.4% 0.127 278.5) |
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 #373785 | 10.25:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #373785 | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #373785 text on white | 10.25:1 | AAA | Lc 93.5 | Preferred for body text |
| #373785 text on black | 2.04:1 | Fails | Lc -9.0 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E8FD
oklch(93.5% 0.029 279.4)
-
Step 200
200
#D1D6FD
oklch(88.5% 0.054 279.5)
-
Step 300
300
#B2BBFE
oklch(80.9% 0.095 278.1)
-
Step 400
400
#8C94FE
oklch(70.6% 0.154 278.4)
-
Step 500
500
#7375FC
oklch(63.1% 0.196 278.5)
-
Step 600
600
#5F59EB
oklch(55.6% 0.213 278.7)
-
Step 700
700
#4F48CC
oklch(49.1% 0.197 278.7)
-
Step 800
800
#403CA5
oklch(42.7% 0.164 278.6)
-
Step 900
900 (this color)
#373785
oklch(38.4% 0.127 278.5)
-
Step 950
950
#1F204D
oklch(27.1% 0.081 278.5)
#373785 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) | #004488 | 0.053 |
| Deuteranopia (no green cones) | #003E83 | 0.050 |
| Tritanopia (no blue cones) | #0A4958 | 0.110 |
| Achromatopsia (no color) | #414141 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373785
#373785
oklch(38.4% 0.127 278.5)
- #4E4300
#4E4300
oklch(38.3% 0.079 98.6)
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 #373785, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.046
- Cobalt #1E488F ΔE 0.050
- Twilight Blue #0A437A ΔE 0.056
- Sapphire #2138AB ΔE 0.068
- Marine Blue #01386A ΔE 0.073
- Light Navy #155084 ΔE 0.073
- Dusk Blue #26538D ΔE 0.076
Use #373785 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.