#313576
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.109 276.8), rgb(49, 53, 118).
Aa
White text reads best on this color (11.04:1).
About this color
#313576 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.109 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.049 away. White text reads best on it, at 11.04:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #313576 |
| RGB | rgb(49, 53, 118) |
| HSL | hsl(237, 41%, 33%) |
| OKLCH | oklch(36.3% 0.109 276.8) |
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 #313576 | 11.04:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #313576 | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #313576 text on white | 11.04:1 | AAA | Lc 95.3 | Preferred for body text |
| #313576 text on black | 1.90:1 | Fails | Lc -7.4 | 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
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B2BCF6
oklch(80.8% 0.083 276.8)
-
Step 400
400
#8C98F1
oklch(70.7% 0.13 276.7)
-
Step 500
500
#727BED
oklch(63.1% 0.169 277)
-
Step 600
600
#5C61DB
oklch(55.5% 0.183 276.9)
-
Step 700
700
#4C50BE
oklch(49.2% 0.169 276.6)
-
Step 800
800
#3E429A
oklch(42.7% 0.141 276.7)
-
Step 900
900 (this color)
#313576
oklch(36.3% 0.109 276.8)
-
Step 950
950
#1E2248
oklch(27% 0.07 276.2)
#313576 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) | #103F78 | 0.040 |
| Deuteranopia (no green cones) | #023975 | 0.044 |
| Tritanopia (no blue cones) | #0B4450 | 0.096 |
| Achromatopsia (no color) | #3C3C3C | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313576
#313576
oklch(36.3% 0.109 276.8)
- #493D00
#493D00
oklch(36.2% 0.075 96.6)
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 #313576, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.049
- Marine Blue #01386A ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.062
- Cobalt #1E488F ΔE 0.063
- Marine #042E60 ΔE 0.068
- Blueberry #464196 ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.077
Use #313576 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.