#313A50
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35% 0.04 267.1), rgb(49, 58, 80).
Aa
White text reads best on this color (11.34:1).
About this color
#313A50 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.040 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.025 away. White text reads best on it, at 11.34:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #313A50 |
| RGB | rgb(49, 58, 80) |
| HSL | hsl(223, 24%, 25%) |
| OKLCH | oklch(35% 0.04 267.1) |
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 #313A50 | 11.34:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #313A50 | 1.85:1 | Fails | Lc 7.7 | Not readable |
| #313A50 text on white | 11.34:1 | AAA | Lc 96.2 | Preferred for body text |
| #313A50 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
#D4D9E5
oklch(88.5% 0.017 267.8)
-
Step 300
300
#B8C1D5
oklch(81% 0.03 266.3)
-
Step 400
400
#93A0C0
oklch(70.7% 0.049 267.7)
-
Step 500
500
#7989B0
oklch(63.2% 0.062 267.3)
-
Step 600
600
#62729B
oklch(55.5% 0.067 267.8)
-
Step 700
700
#516085
oklch(49.2% 0.062 267.1)
-
Step 800
800
#424E6C
oklch(42.6% 0.052 267.4)
-
Step 900
900 (this color)
#313A50
oklch(35% 0.04 267.1)
-
Step 950
950
#212633
oklch(27% 0.025 268.3)
#313A50 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) | #333C51 | 0.007 |
| Deuteranopia (no green cones) | #30394F | 0.004 |
| Tritanopia (no blue cones) | #283E42 | 0.035 |
| Achromatopsia (no color) | #3A3A3A | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313A50
#313A50
oklch(35% 0.04 267.1)
- #443921
#443921
oklch(35% 0.041 85.7)
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 #313A50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.025
- Onyx #343A40 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.036
- Gunmetal #293241 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal #264653 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.043
- Midnight Green #073B4C ΔE 0.044
Use #313A50 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.