#313070
Closest named color: Marine Blue (#01386A). oklch(34.8% 0.108 279.9), rgb(49, 48, 112).
Aa
White text reads best on this color (11.74:1).
About this color
#313070 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.108 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.051 away. White text reads best on it, at 11.74:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.78:1 |
| White text | 11.74:1 |
Values
| HEX | #313070 |
| RGB | rgb(49, 48, 112) |
| HSL | hsl(241, 40%, 31%) |
| OKLCH | oklch(34.8% 0.108 279.9) |
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 #313070 | 11.74:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #313070 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #313070 text on white | 11.74:1 | AAA | Lc 96.7 | Preferred for body text |
| #313070 text on black | 1.78:1 | Fails | Lc 0.0 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D3D7F7
oklch(88.6% 0.044 279.8)
-
Step 300
300
#B6BBF5
oklch(80.8% 0.082 280.6)
-
Step 400
400
#9196EF
oklch(70.6% 0.129 280.1)
-
Step 500
500
#787AEA
oklch(63.1% 0.165 279.8)
-
Step 600
600
#6360D8
oklch(55.6% 0.179 280)
-
Step 700
700
#524EBC
oklch(49.1% 0.168 279.9)
-
Step 800
800
#434198
oklch(42.8% 0.138 279.8)
-
Step 900
900 (this color)
#313070
oklch(34.8% 0.108 279.9)
-
Step 950
950
#212147
oklch(27% 0.069 280.7)
#313070 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) | #093A72 | 0.046 |
| Deuteranopia (no green cones) | #00356F | 0.048 |
| Tritanopia (no blue cones) | #153F4B | 0.093 |
| Achromatopsia (no color) | #383838 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313070
#313070
oklch(34.8% 0.108 279.9)
- #433A00
#433A00
oklch(34.7% 0.072 99.5)
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 #313070, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.056
- Marine #042E60 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.069
- Midnight Blue #191970 ΔE 0.072
- Cobalt #1E488F ΔE 0.079
- Dark Blue Grey #1F3B4D ΔE 0.080
Use #313070 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.