#313080
Closest named color: Dark Slate Blue (#483D8B). oklch(36.2% 0.131 278.1), rgb(49, 48, 128).
Aa
White text reads best on this color (11.25:1).
About this color
#313080 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.131 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 11.25:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.86:1 |
| White text | 11.25:1 |
Values
| HEX | #313080 |
| RGB | rgb(49, 48, 128) |
| HSL | hsl(241, 45%, 35%) |
| OKLCH | oklch(36.2% 0.131 278.1) |
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 #313080 | 11.25:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #313080 | 1.86:1 | Fails | Lc 8.3 | Not readable |
| #313080 text on white | 11.25:1 | AAA | Lc 95.6 | Preferred for body text |
| #313080 text on black | 1.86:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FD
oklch(93.5% 0.029 279.4)
-
Step 200
200
#D0D6FE
oklch(88.4% 0.055 278.5)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8C94FF
oklch(70.7% 0.155 278.4)
-
Step 500
500
#7275FF
oklch(63.2% 0.2 278.1)
-
Step 600
600
#5D58EE
oklch(55.6% 0.218 278.1)
-
Step 700
700
#4E46D0
oklch(49.1% 0.205 278.3)
-
Step 800
800
#3F3BA8
oklch(42.7% 0.169 278.1)
-
Step 900
900 (this color)
#313080
oklch(36.2% 0.131 278.1)
-
Step 950
950
#1E204E
oklch(27.1% 0.083 277.4)
#313080 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) | #003E83 | 0.051 |
| Deuteranopia (no green cones) | #00377E | 0.046 |
| Tritanopia (no blue cones) | #004453 | 0.113 |
| Achromatopsia (no color) | #3B3B3B | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313080
#313080
oklch(36.2% 0.131 278.1)
- #483D00
#483D00
oklch(36.1% 0.074 97.7)
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 #313080, closest first.
No curated palette has a color within ΔE 0.04 of #313080.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Twilight Blue #0A437A ΔE 0.060
- Marine Blue #01386A ΔE 0.063
- Cobalt #1E488F ΔE 0.066
- Blueberry #464196 ΔE 0.067
- Sapphire #2138AB ΔE 0.075
- Midnight Blue #191970 ΔE 0.076
- Marine #042E60 ΔE 0.077
Use #313080 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.