#313877
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.107 275.2), rgb(49, 56, 119).
Aa
White text reads best on this color (10.69:1).
About this color
#313877 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.107 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.043 away. White text reads best on it, at 10.69:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #313877 |
| RGB | rgb(49, 56, 119) |
| HSL | hsl(234, 42%, 33%) |
| OKLCH | oklch(37% 0.107 275.2) |
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 #313877 | 10.69:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #313877 | 1.96:1 | Fails | Lc 9.3 | Not readable |
| #313877 text on white | 10.69:1 | AAA | Lc 94.6 | Preferred for body text |
| #313877 text on black | 1.96:1 | Fails | Lc -8.0 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D7F7
oklch(88.4% 0.045 275.7)
-
Step 300
300
#B1BDF5
oklch(80.9% 0.08 275.1)
-
Step 400
400
#8A99F0
oklch(70.7% 0.128 275.2)
-
Step 500
500
#6F7DEA
oklch(63.1% 0.163 275.2)
-
Step 600
600
#5963D9
oklch(55.6% 0.178 275.3)
-
Step 700
700
#4952BC
oklch(49.2% 0.165 274.9)
-
Step 800
800
#3C4398
oklch(42.6% 0.137 275.4)
-
Step 900
900 (this color)
#313877
oklch(37% 0.107 275.2)
-
Step 950
950
#1D2247
oklch(26.9% 0.068 275)
#313877 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) | #174179 | 0.035 |
| Deuteranopia (no green cones) | #0B3B76 | 0.038 |
| Tritanopia (no blue cones) | #084652 | 0.093 |
| Achromatopsia (no color) | #3E3E3E | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313877
#313877
oklch(37% 0.107 275.2)
- #4C3F00
#4C3F00
oklch(37% 0.076 95.8)
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 #313877, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Marine Blue #01386A ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.052
- Cobalt #1E488F ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Light Navy #155084 ΔE 0.070
- Dark Grey Blue #29465B ΔE 0.071
Use #313877 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.