#313888
Closest named color: Dark Slate Blue (#483D8B). oklch(38.4% 0.132 274.6), rgb(49, 56, 136).
Aa
White text reads best on this color (10.23:1).
About this color
#313888 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.132 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 10.23:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.05:1 |
| White text | 10.23:1 |
Values
| HEX | #313888 |
| RGB | rgb(49, 56, 136) |
| HSL | hsl(235, 47%, 36%) |
| OKLCH | oklch(38.4% 0.132 274.6) |
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 #313888 | 10.23:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #313888 | 2.05:1 | Fails | Lc 10.5 | Not readable |
| #313888 text on white | 10.23:1 | AAA | Lc 93.4 | Preferred for body text |
| #313888 text on black | 2.05:1 | Fails | Lc -9.1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CED7FE
oklch(88.5% 0.055 275)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FF
oklch(70.8% 0.153 274.4)
-
Step 500
500
#6978FF
oklch(63.1% 0.199 274.4)
-
Step 600
600
#545BF0
oklch(55.6% 0.219 274.6)
-
Step 700
700
#4549D1
oklch(49.1% 0.204 274.6)
-
Step 800
800
#383DA9
oklch(42.6% 0.17 274.5)
-
Step 900
900 (this color)
#313888
oklch(38.4% 0.132 274.6)
-
Step 950
950
#1B204E
oklch(26.8% 0.084 274.6)
#313888 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) | #00458B | 0.046 |
| Deuteranopia (no green cones) | #003D86 | 0.041 |
| Tritanopia (no blue cones) | #004B5A | 0.111 |
| Achromatopsia (no color) | #414141 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313888
#313888
oklch(38.4% 0.132 274.6)
- #514200
#514200
oklch(38.4% 0.079 94.3)
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 #313888, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.040
- Cobalt #1E488F ΔE 0.044
- Blueberry #464196 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.051
- Sapphire #2138AB ΔE 0.060
- Light Navy #155084 ΔE 0.069
- Marine Blue #01386A ΔE 0.070
- Dusk Blue #26538D ΔE 0.073
Use #313888 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.