#33308E
Closest named color: Dark Slate Blue (#483D8B). oklch(37.6% 0.15 277.7), rgb(51, 48, 142).
Aa
White text reads best on this color (10.74:1).
About this color
#33308E is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.150 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 10.74:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.74:1 |
Values
| HEX | #33308E |
| RGB | rgb(51, 48, 142) |
| HSL | hsl(242, 49%, 37%) |
| OKLCH | oklch(37.6% 0.15 277.7) |
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 #33308E | 10.74:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #33308E | 1.95:1 | Fails | Lc 9.5 | Not readable |
| #33308E text on white | 10.74:1 | AAA | Lc 94.4 | Preferred for body text |
| #33308E text on black | 1.95:1 | Fails | Lc -8.2 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E8FF
oklch(93.5% 0.031 277.9)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8B94FF
oklch(70.6% 0.155 278)
-
Step 500
500
#7175FF
oklch(63.1% 0.201 277.7)
-
Step 600
600
#5C4FFF
oklch(55.6% 0.249 277.8)
-
Step 700
700
#4C3DDF
oklch(49% 0.233 277.6)
-
Step 800
800
#3E34B4
oklch(42.6% 0.193 277.8)
-
Step 900
900 (this color)
#33308E
oklch(37.6% 0.15 277.7)
-
Step 950
950
#1D1E53
oklch(27% 0.094 277.2)
#33308E 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) | #004291 | 0.055 |
| Deuteranopia (no green cones) | #003A8C | 0.048 |
| Tritanopia (no blue cones) | #00485A | 0.126 |
| Achromatopsia (no color) | #3E3E3E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33308E
#33308E
oklch(37.6% 0.15 277.7)
- #4C4100
#4C4100
oklch(37.5% 0.078 98.3)
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 #33308E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Sapphire #2138AB ΔE 0.054
- Blueberry #464196 ΔE 0.056
- Cobalt #1E488F ΔE 0.062
- Indigo Blue #3A18B1 ΔE 0.065
- Imperial Purple #480CA8 ΔE 0.068
- Twilight Blue #0A437A ΔE 0.070
- Royal #0C1793 ΔE 0.075
Use #33308E 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.