#383B7C
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.108 278.1), rgb(56, 59, 124).
Aa
White text reads best on this color (10.07:1).
About this color
#383B7C is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.108 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.037 away. White text reads best on it, at 10.07:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #383B7C |
| RGB | rgb(56, 59, 124) |
| HSL | hsl(237, 38%, 35%) |
| OKLCH | oklch(38.6% 0.108 278.1) |
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 #383B7C | 10.07:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #383B7C | 2.08:1 | Fails | Lc 10.8 | Not readable |
| #383B7C text on white | 10.07:1 | AAA | Lc 93.2 | Preferred for body text |
| #383B7C text on black | 2.08:1 | Fails | Lc -9.3 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F7
oklch(88.5% 0.044 278.4)
-
Step 300
300
#B4BCF5
oklch(80.9% 0.081 278.2)
-
Step 400
400
#8E97F0
oklch(70.6% 0.13 278.1)
-
Step 500
500
#747BEB
oklch(63.1% 0.166 277.8)
-
Step 600
600
#5F61D9
oklch(55.6% 0.18 278.1)
-
Step 700
700
#4F4FBC
oklch(49% 0.167 278.3)
-
Step 800
800
#404298
oklch(42.7% 0.138 277.8)
-
Step 900
900 (this color)
#383B7C
oklch(38.6% 0.108 278.1)
-
Step 950
950
#1F2247
oklch(27.1% 0.068 277.3)
#383B7C 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) | #1B457E | 0.040 |
| Deuteranopia (no green cones) | #123F7B | 0.042 |
| Tritanopia (no blue cones) | #1A4955 | 0.094 |
| Achromatopsia (no color) | #424242 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383B7C
#383B7C
oklch(38.6% 0.108 278.1)
- #4F4400
#4F4400
oklch(38.6% 0.08 98.7)
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 #383B7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Twilight Blue #0A437A ΔE 0.048
- Cobalt #1E488F ΔE 0.050
- Blueberry #464196 ΔE 0.051
- Light Navy #155084 ΔE 0.064
- Marine Blue #01386A ΔE 0.066
- Dusk Blue #26538D ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.074
Use #383B7C 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.