#313A52
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.1% 0.044 268.3), rgb(49, 58, 82).
Aa
White text reads best on this color (11.30:1).
About this color
#313A52 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.044 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.026 away. White text reads best on it, at 11.30:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #313A52 |
| RGB | rgb(49, 58, 82) |
| HSL | hsl(224, 25%, 26%) |
| OKLCH | oklch(35.1% 0.044 268.3) |
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 #313A52 | 11.30:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #313A52 | 1.85:1 | Fails | Lc 7.8 | Not readable |
| #313A52 text on white | 11.30:1 | AAA | Lc 96.1 | Preferred for body text |
| #313A52 text on black | 1.85:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B7C0D7
oklch(80.8% 0.034 268.6)
-
Step 400
400
#93A0C2
oklch(70.7% 0.052 268.6)
-
Step 500
500
#7888B3
oklch(63% 0.068 268.6)
-
Step 600
600
#61729F
oklch(55.7% 0.073 268.1)
-
Step 700
700
#505F88
oklch(49% 0.069 268.4)
-
Step 800
800
#424E6E
oklch(42.7% 0.056 268.2)
-
Step 900
900 (this color)
#313A52
oklch(35.1% 0.044 268.3)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#313A52 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) | #323C53 | 0.007 |
| Deuteranopia (no green cones) | #2F3951 | 0.005 |
| Tritanopia (no blue cones) | #273F42 | 0.040 |
| Achromatopsia (no color) | #3A3A3A | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313A52
#313A52
oklch(35.1% 0.044 268.3)
- #443A1F
#443A1F
oklch(35.2% 0.044 89.7)
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 #313A52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.026
- Onyx #343A40 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.038
- Gunmetal #293241 ΔE 0.039
- Charcoal #264653 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.045
- Midnight Green #073B4C ΔE 0.045
Use #313A52 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.