#0B33CC
Closest named color: Blue Blue (#2242C7). oklch(42.8% 0.234 264.7), rgb(11, 51, 204).
Aa
White text reads best on this color (8.89:1).
About this color
#0B33CC is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.234 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.036 away. White text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.234) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.35:1 |
| White text | 8.89:1 |
Values
| HEX | #0B33CC |
| RGB | rgb(11, 51, 204) |
| HSL | hsl(228, 90%, 42%) |
| OKLCH | oklch(42.8% 0.234 264.7) |
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 #0B33CC | 8.89:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #0B33CC | 2.35:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #0B33CC text on white | 8.89:1 | AAA | Lc 88.9 | Fine for body text |
| #0B33CC text on black | 2.35:1 | Fails | Lc -13.3 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719DFF
oklch(70.8% 0.152 264.6)
-
Step 500
500
#4C80FF
oklch(63.2% 0.197 264.6)
-
Step 600
600
#285FFF
oklch(55.7% 0.244 264.7)
-
Step 700
700
#0C39FD
oklch(49.1% 0.283 264.7)
-
Step 800
800 (this color)
#0B33CC
oklch(42.8% 0.234 264.7)
-
Step 900
900
#0E31A0
oklch(37.7% 0.182 264.7)
-
Step 950
950
#091F5E
oklch(27.1% 0.116 264.7)
#0B33CC 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) | #0053D0 | 0.067 |
| Deuteranopia (no green cones) | #0040C9 | 0.024 |
| Tritanopia (no blue cones) | #00617D | 0.177 |
| Achromatopsia (no color) | #4A4A4A | 0.235 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B33CC
#0B33CC
oklch(42.8% 0.234 264.7)
- #654A00
#654A00
oklch(42.7% 0.087 84.5)
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 #0B33CC, closest first.
No curated palette has a color within ΔE 0.04 of #0B33CC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.036
- Ultramarine Blue #1805DB ΔE 0.045
- True Blue #010FCC ΔE 0.046
- Pure Blue #0203E2 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.053
- Medium Blue #0000CD ΔE 0.055
- Sapphire #2138AB ΔE 0.055
- Strong Blue #0C06F7 ΔE 0.071
Use #0B33CC 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.