#383A6E
Closest named color: Twilight Blue (#0A437A). oklch(37.4% 0.088 279.6), rgb(56, 58, 110).
Aa
White text reads best on this color (10.50:1).
About this color
#383A6E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.088 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.050 away. White text reads best on it, at 10.50:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #383A6E |
| RGB | rgb(56, 58, 110) |
| HSL | hsl(238, 33%, 33%) |
| OKLCH | oklch(37.4% 0.088 279.6) |
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 #383A6E | 10.50:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #383A6E | 1.99:1 | Fails | Lc 9.7 | Not readable |
| #383A6E text on white | 10.50:1 | AAA | Lc 94.3 | Preferred for body text |
| #383A6E text on black | 1.99:1 | Fails | Lc -8.3 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B7BDEB
oklch(80.9% 0.065 279)
-
Step 400
400
#9399E1
oklch(70.6% 0.105 279.7)
-
Step 500
500
#7A7ED9
oklch(63% 0.135 279.9)
-
Step 600
600
#6466C6
oklch(55.6% 0.146 279.6)
-
Step 700
700
#5354AB
oklch(49% 0.136 279.6)
-
Step 800
800
#44458B
oklch(42.7% 0.113 279.8)
-
Step 900
900 (this color)
#383A6E
oklch(37.4% 0.088 279.6)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#383A6E 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) | #254170 | 0.030 |
| Deuteranopia (no green cones) | #213D6D | 0.031 |
| Tritanopia (no blue cones) | #25454E | 0.077 |
| Achromatopsia (no color) | #3F3F3F | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383A6E
#383A6E
oklch(37.4% 0.088 279.6)
- #4B4100
#4B4100
oklch(37.4% 0.078 99.4)
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 #383A6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.056
- Marine Blue #01386A ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.059
- Cobalt #1E488F ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.070
- Charcoal #264653 ΔE 0.071
Use #383A6E 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.