#303256
Closest named color: Prussian Blue (#1D3557). oklch(33.3% 0.063 280), rgb(48, 50, 86).
Aa
White text reads best on this color (12.23:1).
About this color
#303256 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.063 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 12.23:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.23:1 |
Values
| HEX | #303256 |
| RGB | rgb(48, 50, 86) |
| HSL | hsl(237, 28%, 26%) |
| OKLCH | oklch(33.3% 0.063 280) |
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 #303256 | 12.23:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #303256 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #303256 text on white | 12.23:1 | AAA | Lc 97.9 | Preferred for body text |
| #303256 text on black | 1.71:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#BABEDF
oklch(80.9% 0.047 279.8)
-
Step 400
400
#979CD0
oklch(70.8% 0.076 280)
-
Step 500
500
#7E83C3
oklch(63.2% 0.096 279.8)
-
Step 600
600
#686BB0
oklch(55.6% 0.106 280.5)
-
Step 700
700
#565997
oklch(49% 0.098 280)
-
Step 800
800
#47497A
oklch(42.7% 0.081 280.6)
-
Step 900
900 (this color)
#303256
oklch(33.3% 0.063 280)
-
Step 950
950
#23243A
oklch(27% 0.041 281.3)
#303256 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) | #263757 | 0.020 |
| Deuteranopia (no green cones) | #233455 | 0.020 |
| Tritanopia (no blue cones) | #24393F | 0.056 |
| Achromatopsia (no color) | #353535 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303256
#303256
oklch(33.3% 0.063 280)
- #3E3708
#3E3708
oklch(33.4% 0.063 100.4)
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 #303256, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.042
- Onyx #343A40 ΔE 0.054
- Marine Blue #01386A ΔE 0.055
- Marine #042E60 ΔE 0.055
- Midnight Green #073B4C ΔE 0.056
Use #303256 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.