#313151
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.056 282.9), rgb(49, 49, 81).
Aa
White text reads best on this color (12.43:1).
About this color
#313151 is a dark, muted purple. In OKLCH its lightness is 33%, its chroma 0.056 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.030 away. White text reads best on it, at 12.43:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.43:1 |
Values
| HEX | #313151 |
| RGB | rgb(49, 49, 81) |
| HSL | hsl(240, 25%, 25%) |
| OKLCH | oklch(32.9% 0.056 282.9) |
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 #313151 | 12.43:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #313151 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #313151 text on white | 12.43:1 | AAA | Lc 98.3 | Preferred for body text |
| #313151 text on black | 1.68:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E9
oklch(88.6% 0.023 280.6)
-
Step 300
300
#BCBEDC
oklch(81% 0.042 282.4)
-
Step 400
400
#9A9CCA
oklch(70.8% 0.067 282.6)
-
Step 500
500
#8283BC
oklch(63.2% 0.085 282.9)
-
Step 600
600
#6C6CA8
oklch(55.7% 0.092 283)
-
Step 700
700
#5A5A91
oklch(49.2% 0.087 282.7)
-
Step 800
800
#494975
oklch(42.6% 0.072 282.9)
-
Step 900
900 (this color)
#313151
oklch(32.9% 0.056 282.9)
-
Step 950
950
#242437
oklch(26.9% 0.035 283.8)
#313151 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) | #273552 | 0.018 |
| Deuteranopia (no green cones) | #263350 | 0.018 |
| Tritanopia (no blue cones) | #28373D | 0.048 |
| Achromatopsia (no color) | #343434 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313151
#313151
oklch(32.9% 0.056 282.9)
- #3A3610
#3A3610
oklch(32.8% 0.056 103.3)
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 #313151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.030
- Gunmetal #293241 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.041
- Onyx #343A40 ΔE 0.049
- Midnight Green #073B4C ΔE 0.055
- Marine #042E60 ΔE 0.059
- Marine Blue #01386A ΔE 0.061
Use #313151 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.