#423BEA
Closest named color: Light Royal Blue (#3A2EFE). oklch(49.2% 0.25 274), rgb(66, 59, 234).
Aa
White text reads best on this color (6.89:1).
About this color
#423BEA is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.250 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Light Royal Blue (#3A2EFE), ΔE 0.036 away. White text reads best on it, at 6.89:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.250) |
| Temperature | cool |
| Nearest name | Light Royal Blue (#3A2EFE) |
| Black text | 3.04:1 |
| White text | 6.89:1 |
Values
| HEX | #423BEA |
| RGB | rgb(66, 59, 234) |
| HSL | hsl(242, 81%, 57%) |
| OKLCH | oklch(49.2% 0.25 274) |
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 #423BEA | 6.89:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #423BEA | 3.04:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #423BEA text on white | 6.89:1 | AA | Lc 82.7 | Fine for body text |
| #423BEA text on black | 3.04:1 | AA large text | Lc -19.2 | 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
#ADBCFF
oklch(80.8% 0.096 274.3)
-
Step 400
400
#8497FF
oklch(70.7% 0.153 274)
-
Step 500
500
#6878FF
oklch(63.1% 0.199 274.1)
-
Step 600
600
#5054FF
oklch(55.6% 0.246 273.9)
-
Step 700
700 (this color)
#423BEA
oklch(49.2% 0.25 274)
-
Step 800
800
#3533BD
oklch(42.7% 0.207 273.9)
-
Step 900
900
#2C3095
oklch(37.7% 0.162 273.8)
-
Step 950
950
#191E57
oklch(27.1% 0.102 273.6)
#423BEA 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) | #0062EF | 0.079 |
| Deuteranopia (no green cones) | #0052E7 | 0.054 |
| Tritanopia (no blue cones) | #006F90 | 0.196 |
| Achromatopsia (no color) | #5A5A5A | 0.251 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423BEA
#423BEA
oklch(49.2% 0.25 274)
- #745F00
#745F00
oklch(49.2% 0.101 93.8)
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 #423BEA, closest first.
No curated palette has a color within ΔE 0.04 of #423BEA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Royal Blue #3A2EFE ΔE 0.036
- Purpley Blue #5F34E7 ΔE 0.045
- Majorelle Blue #3F37C9 ΔE 0.054
- Vibrant Blue #0339F8 ΔE 0.054
- Blue Purple #5A06EF ΔE 0.055
- Blurple #5539CC ΔE 0.056
- Vivid Blue #152EFF ΔE 0.059
- Warm Blue #4B57DB ΔE 0.061
Use #423BEA 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.