#333FA0
Closest named color: Blueberry (#464196). oklch(41.9% 0.156 272.4), rgb(51, 63, 160).
Aa
White text reads best on this color (8.90:1).
About this color
#333FA0 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.156 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.033 away. White text reads best on it, at 8.90:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.35:1 |
| White text | 8.90:1 |
Values
| HEX | #333FA0 |
| RGB | rgb(51, 63, 160) |
| HSL | hsl(233, 52%, 41%) |
| OKLCH | oklch(41.9% 0.156 272.4) |
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 #333FA0 | 8.90:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #333FA0 | 2.35:1 | Fails | Lc 14.0 | Not readable |
| #333FA0 text on white | 8.90:1 | AAA | Lc 89.9 | Fine for body text |
| #333FA0 text on black | 2.35:1 | Fails | Lc -12.3 | 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
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ACBDFC
oklch(80.8% 0.091 272.6)
-
Step 400
400
#8299FB
oklch(70.8% 0.146 272.2)
-
Step 500
500
#657BF8
oklch(63% 0.187 272.4)
-
Step 600
600
#4F61E7
oklch(55.6% 0.202 272.2)
-
Step 700
700
#414FC9
oklch(49.2% 0.188 272.4)
-
Step 800
800 (this color)
#333FA0
oklch(41.9% 0.156 272.4)
-
Step 900
900
#2D3981
oklch(37.8% 0.121 272.2)
-
Step 950
950
#1A224B
oklch(27% 0.076 272.1)
#333FA0 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) | #004FA3 | 0.048 |
| Deuteranopia (no green cones) | #00459E | 0.038 |
| Tritanopia (no blue cones) | #005769 | 0.128 |
| Achromatopsia (no color) | #4A4A4A | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333FA0
#333FA0
oklch(41.9% 0.156 272.4)
- #5D4B00
#5D4B00
oklch(41.9% 0.086 93)
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 #333FA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.033
- Sapphire #2138AB ΔE 0.033
- Cobalt #1E488F ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.046
- Blue Blue #2242C7 ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
- Majorelle Blue #3F37C9 ΔE 0.068
- Indigo Blue #3A18B1 ΔE 0.071
Use #333FA0 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.