#313783
Closest named color: Dark Slate Blue (#483D8B). oklch(37.8% 0.126 275.2), rgb(49, 55, 131).
Aa
White text reads best on this color (10.47:1).
About this color
#313783 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.126 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 10.47:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #313783 |
| RGB | rgb(49, 55, 131) |
| HSL | hsl(236, 46%, 35%) |
| OKLCH | oklch(37.8% 0.126 275.2) |
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 #313783 | 10.47:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #313783 | 2.00:1 | Fails | Lc 9.9 | Not readable |
| #313783 text on white | 10.47:1 | AAA | Lc 94.0 | Preferred for body text |
| #313783 text on black | 2.00:1 | Fails | Lc -8.6 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FD
oklch(88.5% 0.053 275.9)
-
Step 300
300
#AFBCFE
oklch(80.9% 0.095 275.5)
-
Step 400
400
#8696FE
oklch(70.6% 0.152 275.2)
-
Step 500
500
#6B78FB
oklch(63% 0.193 275.1)
-
Step 600
600
#565DEB
oklch(55.7% 0.21 275.1)
-
Step 700
700
#474BCC
oklch(49.1% 0.195 275.2)
-
Step 800
800
#3A3FA5
oklch(42.8% 0.161 275.1)
-
Step 900
900 (this color)
#313783
oklch(37.8% 0.126 275.2)
-
Step 950
950
#1C214D
oklch(27.1% 0.08 274.8)
#313783 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) | #004386 | 0.046 |
| Deuteranopia (no green cones) | #003C81 | 0.042 |
| Tritanopia (no blue cones) | #004957 | 0.108 |
| Achromatopsia (no color) | #3F3F3F | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313783
#313783
oklch(37.8% 0.126 275.2)
- #4F4100
#4F4100
oklch(37.9% 0.078 95.1)
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 #313783, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Twilight Blue #0A437A ΔE 0.049
- Cobalt #1E488F ΔE 0.049
- Blueberry #464196 ΔE 0.053
- Marine Blue #01386A ΔE 0.064
- Sapphire #2138AB ΔE 0.068
- Light Navy #155084 ΔE 0.071
- Dusk Blue #26538D ΔE 0.077
Use #313783 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.