#313155
Closest named color: Prussian Blue (#1D3557). oklch(33.1% 0.063 282.4), rgb(49, 49, 85).
Aa
White text reads best on this color (12.34:1).
About this color
#313155 is a dark, muted purple. In OKLCH its lightness is 33%, its chroma 0.063 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 12.34:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.70:1 |
| White text | 12.34:1 |
Values
| HEX | #313155 |
| RGB | rgb(49, 49, 85) |
| HSL | hsl(240, 27%, 26%) |
| OKLCH | oklch(33.1% 0.063 282.4) |
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 #313155 | 12.34:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #313155 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #313155 text on white | 12.34:1 | AAA | Lc 98.1 | Preferred for body text |
| #313155 text on black | 1.70:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EB
oklch(88.4% 0.027 283.5)
-
Step 300
300
#BBBDDF
oklch(80.8% 0.048 282.6)
-
Step 400
400
#999BCF
oklch(70.7% 0.076 282.6)
-
Step 500
500
#8182C2
oklch(63.2% 0.096 282.6)
-
Step 600
600
#6A6AAF
oklch(55.5% 0.106 282.4)
-
Step 700
700
#595996
oklch(49.2% 0.096 282.3)
-
Step 800
800
#49497A
oklch(42.8% 0.08 282.5)
-
Step 900
900 (this color)
#313155
oklch(33.1% 0.063 282.4)
-
Step 950
950
#232439
oklch(27% 0.039 281.4)
#313155 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) | #253656 | 0.022 |
| Deuteranopia (no green cones) | #233354 | 0.022 |
| Tritanopia (no blue cones) | #27383F | 0.054 |
| Achromatopsia (no color) | #353535 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313155
#313155
oklch(33.1% 0.063 282.4)
- #3C3708
#3C3708
oklch(33.2% 0.064 103.1)
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 #313155, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.036
- Gunmetal #293241 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.044
- Onyx #343A40 ΔE 0.054
- Marine #042E60 ΔE 0.057
- Marine Blue #01386A ΔE 0.057
- Midnight Green #073B4C ΔE 0.058
Use #313155 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.