#313E9C
Closest named color: Blueberry (#464196). oklch(41.3% 0.152 271.9), rgb(49, 62, 156).
Aa
White text reads best on this color (9.13:1).
About this color
#313E9C is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.152 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.034 away. White text reads best on it, at 9.13:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #313E9C |
| RGB | rgb(49, 62, 156) |
| HSL | hsl(233, 52%, 40%) |
| OKLCH | oklch(41.3% 0.152 271.9) |
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 #313E9C | 9.13:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #313E9C | 2.29:1 | Fails | Lc 13.4 | Not readable |
| #313E9C text on white | 9.13:1 | AAA | Lc 90.6 | Preferred for body text |
| #313E9C text on black | 2.29:1 | Fails | Lc -11.7 | 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 800.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ACBEFB
oklch(81% 0.089 271.6)
-
Step 400
400
#8299F9
oklch(70.7% 0.143 272.1)
-
Step 500
500
#657CF6
oklch(63% 0.183 272.1)
-
Step 600
600
#4E62E5
oklch(55.6% 0.198 271.8)
-
Step 700
700
#4050C7
oklch(49.1% 0.184 271.9)
-
Step 800
800 (this color)
#313E9C
oklch(41.3% 0.152 271.9)
-
Step 900
900
#2D3980
oklch(37.7% 0.12 272.1)
-
Step 950
950
#1A224B
oklch(27% 0.076 272.1)
#313E9C 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) | #004D9F | 0.045 |
| Deuteranopia (no green cones) | #00439A | 0.036 |
| Tritanopia (no blue cones) | #005567 | 0.123 |
| Achromatopsia (no color) | #484848 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313E9C
#313E9C
oklch(41.3% 0.152 271.9)
- #5C4900
#5C4900
oklch(41.3% 0.085 91.7)
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 #313E9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.034
- Cobalt #1E488F ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.044
- Dusk Blue #26538D ΔE 0.064
- Light Navy #155084 ΔE 0.069
- Twilight Blue #0A437A ΔE 0.069
- Blue Blue #2242C7 ΔE 0.071
Use #313E9C 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.