#313673
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.103 276.4), rgb(49, 54, 115).
Aa
White text reads best on this color (11.01:1).
About this color
#313673 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.103 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.047 away. White text reads best on it, at 11.01:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.01:1 |
Values
| HEX | #313673 |
| RGB | rgb(49, 54, 115) |
| HSL | hsl(235, 40%, 32%) |
| OKLCH | oklch(36.3% 0.103 276.4) |
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 #313673 | 11.01:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #313673 | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #313673 text on white | 11.01:1 | AAA | Lc 95.3 | Preferred for body text |
| #313673 text on black | 1.90:1 | Fails | Lc -7.4 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B3BDF3
oklch(80.9% 0.077 276.4)
-
Step 400
400
#8C99ED
oklch(70.7% 0.124 276.1)
-
Step 500
500
#727DE7
oklch(63.1% 0.158 276.4)
-
Step 600
600
#5C63D5
oklch(55.5% 0.172 276.6)
-
Step 700
700
#4C52B9
oklch(49.2% 0.16 276.3)
-
Step 800
800
#3E4496
oklch(42.8% 0.132 276.1)
-
Step 900
900 (this color)
#313673
oklch(36.3% 0.103 276.4)
-
Step 950
950
#1E2246
oklch(26.9% 0.066 276.2)
#313673 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) | #173F75 | 0.036 |
| Deuteranopia (no green cones) | #0D3972 | 0.038 |
| Tritanopia (no blue cones) | #10444F | 0.091 |
| Achromatopsia (no color) | #3C3C3C | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313673
#313673
oklch(36.3% 0.103 276.4)
- #493D00
#493D00
oklch(36.2% 0.075 96.6)
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 #313673, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.047
- Marine Blue #01386A ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.059
- Cobalt #1E488F ΔE 0.065
- Marine #042E60 ΔE 0.067
- Dark Grey Blue #29465B ΔE 0.071
- Blueberry #464196 ΔE 0.073
Use #313673 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.