#333FEC
Closest named color: Light Royal Blue (#3A2EFE). oklch(49.2% 0.252 269.8), rgb(51, 63, 236).
Aa
White text reads best on this color (6.85:1).
About this color
#333FEC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.252 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Light Royal Blue (#3A2EFE), ΔE 0.033 away. White text reads best on it, at 6.85:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.252) |
| Temperature | cool |
| Nearest name | Light Royal Blue (#3A2EFE) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #333FEC |
| RGB | rgb(51, 63, 236) |
| HSL | hsl(236, 83%, 56%) |
| OKLCH | oklch(49.2% 0.252 269.8) |
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 #333FEC | 6.85:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #333FEC | 3.06:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #333FEC text on white | 6.85:1 | AA | Lc 82.5 | Fine for body text |
| #333FEC text on black | 3.06:1 | AA large text | Lc -19.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#4259FF
oklch(55.6% 0.245 269.9)
-
Step 700
700 (this color)
#333FEC
oklch(49.2% 0.252 269.8)
-
Step 800
800
#2936BE
oklch(42.6% 0.208 269.8)
-
Step 900
900
#233296
oklch(37.7% 0.163 269.8)
-
Step 950
950
#141F58
oklch(27.1% 0.103 269.7)
#333FEC 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) | #0063F1 | 0.071 |
| Deuteranopia (no green cones) | #0051E9 | 0.038 |
| Tritanopia (no blue cones) | #007292 | 0.195 |
| Achromatopsia (no color) | #5A5A5A | 0.253 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333FEC
#333FEC
oklch(49.2% 0.252 269.8)
- #775D00
#775D00
oklch(49.1% 0.1 89.6)
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 #333FEC, closest first.
No curated palette has a color within ΔE 0.04 of #333FEC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Royal Blue #3A2EFE ΔE 0.033
- Vibrant Blue #0339F8 ΔE 0.038
- Vivid Blue #152EFF ΔE 0.046
- Electric Blue #0652FF ΔE 0.049
- Azul #1D5DEC ΔE 0.058
- Majorelle Blue #3F37C9 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.060
- Purpley Blue #5F34E7 ΔE 0.063
Use #333FEC 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.