#383F73
Closest named color: Twilight Blue (#0A437A). oklch(38.8% 0.088 275.7), rgb(56, 63, 115).
Aa
White text reads best on this color (9.87:1).
About this color
#383F73 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.088 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.044 away. White text reads best on it, at 9.87:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.12:1 |
| White text | 9.87:1 |
Values
| HEX | #383F73 |
| RGB | rgb(56, 63, 115) |
| HSL | hsl(233, 35%, 34%) |
| OKLCH | oklch(38.8% 0.088 275.7) |
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 #383F73 | 9.87:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #383F73 | 2.12:1 | Fails | Lc 11.2 | Not readable |
| #383F73 text on white | 9.87:1 | AAA | Lc 92.8 | Preferred for body text |
| #383F73 text on black | 2.12:1 | Fails | Lc -9.7 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B4BEEC
oklch(80.9% 0.066 275.3)
-
Step 400
400
#8E9BE2
oklch(70.7% 0.105 275.4)
-
Step 500
500
#7480DA
oklch(63.1% 0.135 276.1)
-
Step 600
600
#5D68C8
oklch(55.6% 0.147 275.6)
-
Step 700
700
#4D56AD
oklch(49.1% 0.137 275.7)
-
Step 800
800
#3F478C
oklch(42.8% 0.113 275.6)
-
Step 900
900 (this color)
#383F73
oklch(38.8% 0.088 275.7)
-
Step 950
950
#1F2341
oklch(26.9% 0.056 276.2)
#383F73 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) | #2A4675 | 0.025 |
| Deuteranopia (no green cones) | #254172 | 0.025 |
| Tritanopia (no blue cones) | #214A53 | 0.078 |
| Achromatopsia (no color) | #434343 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383F73
#383F73
oklch(38.8% 0.088 275.7)
- #524400
#524400
oklch(39% 0.08 95.7)
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 #383F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.049
- Cobalt #1E488F ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Light Navy #155084 ΔE 0.058
- Blueberry #464196 ΔE 0.063
- Marine Blue #01386A ΔE 0.063
- Dusk Blue #26538D ΔE 0.066
Use #383F73 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.