#31396C
Closest named color: Twilight Blue (#0A437A). oklch(36.5% 0.088 274.5), rgb(49, 57, 108).
Aa
White text reads best on this color (10.86:1).
About this color
#31396C is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.088 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.045 away. White text reads best on it, at 10.86:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.93:1 |
| White text | 10.86:1 |
Values
| HEX | #31396C |
| RGB | rgb(49, 57, 108) |
| HSL | hsl(232, 38%, 31%) |
| OKLCH | oklch(36.5% 0.088 274.5) |
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 #31396C | 10.86:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #31396C | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #31396C text on white | 10.86:1 | AAA | Lc 95.0 | Preferred for body text |
| #31396C text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B3BEEC
oklch(80.9% 0.066 274.3)
-
Step 400
400
#8D9BE2
oklch(70.6% 0.105 274.9)
-
Step 500
500
#7281DA
oklch(63.1% 0.135 274.7)
-
Step 600
600
#5B69C8
oklch(55.7% 0.147 274.3)
-
Step 700
700
#4B57AD
oklch(49.2% 0.136 274.3)
-
Step 800
800
#3D478C
oklch(42.6% 0.114 274.3)
-
Step 900
900 (this color)
#31396C
oklch(36.5% 0.088 274.5)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#31396C 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) | #23406E | 0.025 |
| Deuteranopia (no green cones) | #1D3B6B | 0.025 |
| Tritanopia (no blue cones) | #17444D | 0.078 |
| Achromatopsia (no color) | #3D3D3D | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31396C
#31396C
oklch(36.5% 0.088 274.5)
- #4B3D00
#4B3D00
oklch(36.4% 0.075 94.3)
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 #31396C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.045
- Marine Blue #01386A ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Marine #042E60 ΔE 0.066
- Cobalt #1E488F ΔE 0.068
Use #31396C 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.