#373782
Closest named color: Dark Slate Blue (#483D8B). oklch(38.1% 0.123 278.8), rgb(55, 55, 130).
Aa
White text reads best on this color (10.33:1).
About this color
#373782 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.123 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.036 away. White text reads best on it, at 10.33:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #373782 |
| RGB | rgb(55, 55, 130) |
| HSL | hsl(240, 41%, 36%) |
| OKLCH | oklch(38.1% 0.123 278.8) |
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 #373782 | 10.33:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #373782 | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #373782 text on white | 10.33:1 | AAA | Lc 93.7 | Preferred for body text |
| #373782 text on black | 2.03:1 | Fails | Lc -8.8 | 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
#E5E8FC
oklch(93.5% 0.027 279.1)
-
Step 200
200
#D1D6FB
oklch(88.4% 0.051 279.2)
-
Step 300
300
#B3BBFC
oklch(80.9% 0.092 278.7)
-
Step 400
400
#8E95FB
oklch(70.8% 0.148 278.9)
-
Step 500
500
#7476F8
oklch(63% 0.19 278.8)
-
Step 600
600
#5F5BE7
oklch(55.6% 0.205 278.6)
-
Step 700
700
#4F49C9
oklch(49% 0.192 278.7)
-
Step 800
800
#413DA2
oklch(42.7% 0.158 279.1)
-
Step 900
900 (this color)
#373782
oklch(38.1% 0.123 278.8)
-
Step 950
950
#1F204B
oklch(26.9% 0.078 278.8)
#373782 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) | #014385 | 0.052 |
| Deuteranopia (no green cones) | #003D80 | 0.051 |
| Tritanopia (no blue cones) | #104857 | 0.106 |
| Achromatopsia (no color) | #404040 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373782
#373782
oklch(38.1% 0.123 278.8)
- #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 #373782, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.036
- Blueberry #464196 ΔE 0.049
- Cobalt #1E488F ΔE 0.052
- Twilight Blue #0A437A ΔE 0.054
- Marine Blue #01386A ΔE 0.070
- Sapphire #2138AB ΔE 0.072
- Light Navy #155084 ΔE 0.073
- Dusk Blue #26538D ΔE 0.077
Use #373782 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.