#303582
Closest named color: Dark Slate Blue (#483D8B). oklch(37.2% 0.128 275.5), rgb(48, 53, 130).
Aa
White text reads best on this color (10.72:1).
About this color
#303582 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.128 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.72:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #303582 |
| RGB | rgb(48, 53, 130) |
| HSL | hsl(236, 46%, 35%) |
| OKLCH | oklch(37.2% 0.128 275.5) |
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 #303582 | 10.72:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #303582 | 1.95:1 | Fails | Lc 9.4 | Not readable |
| #303582 text on white | 10.72:1 | AAA | Lc 94.5 | Preferred for body text |
| #303582 text on black | 1.95:1 | Fails | Lc -8.1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FD
oklch(88.5% 0.053 275.9)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8796FF
oklch(70.7% 0.154 275.6)
-
Step 500
500
#6C78FD
oklch(63.2% 0.195 275.4)
-
Step 600
600
#575CEC
oklch(55.7% 0.212 275.5)
-
Step 700
700
#484ACD
oklch(49.1% 0.197 275.7)
-
Step 800
800
#3A3EA6
oklch(42.7% 0.164 275.3)
-
Step 900
900 (this color)
#303582
oklch(37.2% 0.128 275.5)
-
Step 950
950
#1C214D
oklch(27.1% 0.08 274.8)
#303582 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) | #004185 | 0.046 |
| Deuteranopia (no green cones) | #003A80 | 0.042 |
| Tritanopia (no blue cones) | #004756 | 0.108 |
| Achromatopsia (no color) | #3E3E3E | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303582
#303582
oklch(37.2% 0.128 275.5)
- #4D3F00
#4D3F00
oklch(37.2% 0.076 94.7)
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 #303582, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.051
- Cobalt #1E488F ΔE 0.054
- Blueberry #464196 ΔE 0.058
- Marine Blue #01386A ΔE 0.062
- Sapphire #2138AB ΔE 0.070
- Light Navy #155084 ΔE 0.076
- Prussian Blue #1D3557 ΔE 0.080
Use #303582 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.