#33307F
Closest named color: Dark Slate Blue (#483D8B). oklch(36.2% 0.129 279.4), rgb(51, 48, 127).
Aa
White text reads best on this color (11.22:1).
About this color
#33307F is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.129 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 11.22:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #33307F |
| RGB | rgb(51, 48, 127) |
| HSL | hsl(242, 45%, 34%) |
| OKLCH | oklch(36.2% 0.129 279.4) |
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 #33307F | 11.22:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #33307F | 1.87:1 | Fails | Lc 8.3 | Not readable |
| #33307F text on white | 11.22:1 | AAA | Lc 95.6 | Preferred for body text |
| #33307F 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E8FD
oklch(93.5% 0.029 279.4)
-
Step 200
200
#D1D6FD
oklch(88.5% 0.054 279.5)
-
Step 300
300
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8E93FF
oklch(70.6% 0.156 279.6)
-
Step 500
500
#7574FD
oklch(63.1% 0.199 279.4)
-
Step 600
600
#6158EC
oklch(55.7% 0.215 279.5)
-
Step 700
700
#5146CD
oklch(49.1% 0.2 279.7)
-
Step 800
800
#423BA6
oklch(42.7% 0.166 279.7)
-
Step 900
900 (this color)
#33307F
oklch(36.2% 0.129 279.4)
-
Step 950
950
#201F4D
oklch(26.9% 0.083 280.3)
#33307F 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) | #003E82 | 0.053 |
| Deuteranopia (no green cones) | #00387D | 0.050 |
| Tritanopia (no blue cones) | #044352 | 0.112 |
| Achromatopsia (no color) | #3B3B3B | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33307F
#33307F
oklch(36.2% 0.129 279.4)
- #473E00
#473E00
oklch(36.2% 0.075 100.1)
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 #33307F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight Blue #0A437A ΔE 0.061
- Marine Blue #01386A ΔE 0.065
- Blueberry #464196 ΔE 0.067
- Cobalt #1E488F ΔE 0.067
- Midnight Blue #191970 ΔE 0.077
- Sapphire #2138AB ΔE 0.077
- Marine #042E60 ΔE 0.078
Use #33307F 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.