#421ACE
Closest named color: Violet Blue (#510AC9). oklch(42.8% 0.243 278.8), rgb(66, 26, 206).
Aa
White text reads best on this color (9.24:1).
About this color
#421ACE is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.243 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Violet Blue (#510AC9), ΔE 0.031 away. White text reads best on it, at 9.24:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.243) |
| Temperature | cool |
| Nearest name | Violet Blue (#510AC9) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #421ACE |
| RGB | rgb(66, 26, 206) |
| HSL | hsl(253, 78%, 45%) |
| OKLCH | oklch(42.8% 0.243 278.8) |
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 #421ACE | 9.24:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #421ACE | 2.27:1 | Fails | Lc 14.4 | Not readable |
| #421ACE text on white | 9.24:1 | AAA | Lc 89.6 | Fine for body text |
| #421ACE text on black | 2.27:1 | Fails | Lc -12.7 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8D94FF
oklch(70.8% 0.155 278.8)
-
Step 500
500
#7374FF
oklch(63.1% 0.202 278.6)
-
Step 600
600
#5F4EFF
oklch(55.7% 0.249 278.8)
-
Step 700
700
#520FFF
oklch(49.1% 0.293 278.8)
-
Step 800
800 (this color)
#421ACE
oklch(42.8% 0.243 278.8)
-
Step 900
900
#3523A1
oklch(37.7% 0.189 278.7)
-
Step 950
950
#1E185E
oklch(27% 0.119 278.7)
#421ACE 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) | #004ED3 | 0.090 |
| Deuteranopia (no green cones) | #0040CB | 0.070 |
| Tritanopia (no blue cones) | #00587A | 0.191 |
| Achromatopsia (no color) | #474747 | 0.245 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #421ACE
#421ACE
oklch(42.8% 0.243 278.8)
- #5C4F00
#5C4F00
oklch(42.8% 0.088 98.3)
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 #421ACE, closest first.
No curated palette has a color within ΔE 0.04 of #421ACE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Violet Blue #510AC9 ΔE 0.031
- Majorelle Blue #3F37C9 ΔE 0.038
- Indigo Blue #3A18B1 ΔE 0.050
- Purple Blue #5D21D0 ΔE 0.052
- Blurple #5539CC ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blue Blue #2242C7 ΔE 0.064
- Blue Purple #5A06EF ΔE 0.064
Use #421ACE 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.