#4337EC
Closest named color: Light Royal Blue (#3A2EFE). oklch(49% 0.255 274.4), rgb(67, 55, 236).
Aa
White text reads best on this color (7.00:1).
About this color
#4337EC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.255 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Light Royal Blue (#3A2EFE), ΔE 0.032 away. White text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.255) |
| Temperature | cool |
| Nearest name | Light Royal Blue (#3A2EFE) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #4337EC |
| RGB | rgb(67, 55, 236) |
| HSL | hsl(244, 83%, 57%) |
| OKLCH | oklch(49% 0.255 274.4) |
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 #4337EC | 7.00:1 | AAA | Lc -88.1 | Fine for body text |
| Black text on #4337EC | 2.99:1 | Fails | Lc 21.0 | Dividers and decoration only |
| #4337EC text on white | 7.00:1 | AAA | Lc 83.0 | Fine for body text |
| #4337EC text on black | 2.99:1 | Fails | Lc -18.9 | 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
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FF
oklch(70.8% 0.153 274.4)
-
Step 500
500
#6978FF
oklch(63.1% 0.199 274.4)
-
Step 600
600
#5254FF
oklch(55.7% 0.246 274.4)
-
Step 700
700 (this color)
#4337EC
oklch(49% 0.255 274.4)
-
Step 800
800
#3631BF
oklch(42.7% 0.211 274.3)
-
Step 900
900
#2D2F96
oklch(37.7% 0.164 274.4)
-
Step 950
950
#1A1D58
oklch(27% 0.104 274.7)
#4337EC 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) | #0061F1 | 0.082 |
| Deuteranopia (no green cones) | #0050E9 | 0.056 |
| Tritanopia (no blue cones) | #006E91 | 0.199 |
| Achromatopsia (no color) | #595959 | 0.256 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4337EC
#4337EC
oklch(49% 0.255 274.4)
- #735F00
#735F00
oklch(49.1% 0.101 94.6)
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 #4337EC, closest first.
No curated palette has a color within ΔE 0.04 of #4337EC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Royal Blue #3A2EFE ΔE 0.032
- Purpley Blue #5F34E7 ΔE 0.045
- Blue Purple #5A06EF ΔE 0.050
- Vibrant Blue #0339F8 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.055
- Vivid Blue #152EFF ΔE 0.057
- Blurple #5539CC ΔE 0.058
- Purply Blue #661AEE ΔE 0.061
Use #4337EC 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.