#313B50
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.3% 0.039 264.7), rgb(49, 59, 80).
Aa
White text reads best on this color (11.21:1).
About this color
#313B50 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.039 and its hue 265°. 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 11.21:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.87:1 |
| White text | 11.21:1 |
Values
| HEX | #313B50 |
| RGB | rgb(49, 59, 80) |
| HSL | hsl(221, 24%, 25%) |
| OKLCH | oklch(35.3% 0.039 264.7) |
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 #313B50 | 11.21:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #313B50 | 1.87:1 | Fails | Lc 8.0 | Not readable |
| #313B50 text on white | 11.21:1 | AAA | Lc 95.9 | Preferred for body text |
| #313B50 text on black | 1.87:1 | 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
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B7C1D4
oklch(80.9% 0.029 263.4)
-
Step 400
400
#92A1BF
oklch(70.8% 0.047 264.2)
-
Step 500
500
#7789AF
oklch(63% 0.061 264.9)
-
Step 600
600
#60739A
oklch(55.6% 0.065 264.3)
-
Step 700
700
#506084
oklch(49.1% 0.061 265.7)
-
Step 800
800
#414F6B
oklch(42.8% 0.05 263.8)
-
Step 900
900 (this color)
#313B50
oklch(35.3% 0.039 264.7)
-
Step 950
950
#202633
oklch(26.9% 0.026 265.4)
#313B50 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) | #343C51 | 0.006 |
| Deuteranopia (no green cones) | #313A50 | 0.003 |
| Tritanopia (no blue cones) | #283F42 | 0.035 |
| Achromatopsia (no color) | #3B3B3B | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313B50
#313B50
oklch(35.3% 0.039 264.7)
- #453A23
#453A23
oklch(35.4% 0.039 84.9)
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 #313B50, 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 0.028
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.036
- Gunmetal #293241 ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.040
- Midnight Green #073B4C ΔE 0.044
Use #313B50 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.