#313981
Closest named color: Dark Slate Blue (#483D8B). oklch(38% 0.12 274.4), rgb(49, 57, 129).
Aa
White text reads best on this color (10.33:1).
About this color
#313981 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.120 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 10.33:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #313981 |
| RGB | rgb(49, 57, 129) |
| HSL | hsl(234, 45%, 35%) |
| OKLCH | oklch(38% 0.12 274.4) |
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 #313981 | 10.33:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #313981 | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #313981 text on white | 10.33:1 | AAA | Lc 93.7 | Preferred for body text |
| #313981 text on black | 2.03:1 | Fails | Lc -8.8 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#AFBDFB
oklch(81% 0.089 274.4)
-
Step 400
400
#8698FA
oklch(70.8% 0.144 274.3)
-
Step 500
500
#6B7AF7
oklch(63.1% 0.185 274.7)
-
Step 600
600
#555FE6
oklch(55.6% 0.202 274.5)
-
Step 700
700
#464EC8
oklch(49.2% 0.187 274.4)
-
Step 800
800
#3941A1
oklch(42.8% 0.153 274.3)
-
Step 900
900 (this color)
#313981
oklch(38% 0.12 274.4)
-
Step 950
950
#1C224B
oklch(27.1% 0.076 274)
#313981 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) | #094484 | 0.042 |
| Deuteranopia (no green cones) | #003D80 | 0.041 |
| Tritanopia (no blue cones) | #004A57 | 0.104 |
| Achromatopsia (no color) | #404040 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313981
#313981
oklch(38% 0.12 274.4)
- #504100
#504100
oklch(38% 0.078 94.1)
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 #313981, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Twilight Blue #0A437A ΔE 0.044
- Cobalt #1E488F ΔE 0.046
- Blueberry #464196 ΔE 0.053
- Marine Blue #01386A ΔE 0.062
- Light Navy #155084 ΔE 0.066
- Sapphire #2138AB ΔE 0.072
- Dusk Blue #26538D ΔE 0.072
Use #313981 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.