#333F9D
Closest named color: Blueberry (#464196). oklch(41.7% 0.152 272.4), rgb(51, 63, 157).
Aa
White text reads best on this color (8.97:1).
About this color
#333F9D is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.152 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.031 away. White text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.33:1 |
| White text | 8.97:1 |
Values
| HEX | #333F9D |
| RGB | rgb(51, 63, 157) |
| HSL | hsl(233, 51%, 41%) |
| OKLCH | oklch(41.7% 0.152 272.4) |
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 #333F9D | 8.97:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #333F9D | 2.33:1 | Fails | Lc 13.8 | Not readable |
| #333F9D text on white | 8.97:1 | AAA | Lc 90.2 | Preferred for body text |
| #333F9D text on black | 2.33:1 | Fails | Lc -12.1 | 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 800.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#ADBDFB
oklch(80.8% 0.09 273.1)
-
Step 400
400
#8399F9
oklch(70.7% 0.143 272.5)
-
Step 500
500
#667CF5
oklch(63% 0.181 272.4)
-
Step 600
600
#5062E4
oklch(55.7% 0.197 272.4)
-
Step 700
700
#4150C6
oklch(49.1% 0.183 272.3)
-
Step 800
800 (this color)
#333F9D
oklch(41.7% 0.152 272.4)
-
Step 900
900
#2E397F
oklch(37.7% 0.118 272.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#333F9D 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) | #004EA0 | 0.047 |
| Deuteranopia (no green cones) | #00459B | 0.038 |
| Tritanopia (no blue cones) | #005667 | 0.126 |
| Achromatopsia (no color) | #494949 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333F9D
#333F9D
oklch(41.7% 0.152 272.4)
- #5D4A00
#5D4A00
oklch(41.7% 0.085 91.9)
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 #333F9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.031
- Sapphire #2138AB ΔE 0.036
- Cobalt #1E488F ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.043
- Dusk Blue #26538D ΔE 0.063
- Light Navy #155084 ΔE 0.069
- Blue Blue #2242C7 ΔE 0.069
- Twilight Blue #0A437A ΔE 0.071
Use #333F9D 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.