#4243B8
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(45.7% 0.18 276.2), rgb(66, 67, 184).
Aa
White text reads best on this color (7.70:1).
About this color
#4243B8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.180 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.035 away. White text reads best on it, at 7.70:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 2.72:1 |
| White text | 7.70:1 |
Values
| HEX | #4243B8 |
| RGB | rgb(66, 67, 184) |
| HSL | hsl(239, 47%, 49%) |
| OKLCH | oklch(45.7% 0.18 276.2) |
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 #4243B8 | 7.70:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #4243B8 | 2.72:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #4243B8 text on white | 7.70:1 | AAA | Lc 86.2 | Fine for body text |
| #4243B8 text on black | 2.72:1 | Fails | Lc -15.8 | 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 800.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BCFF
oklch(81% 0.096 276.2)
-
Step 400
400
#8895FF
oklch(70.6% 0.155 276.4)
-
Step 500
500
#6D76FF
oklch(63% 0.2 276.2)
-
Step 600
600
#5856F7
oklch(55.7% 0.233 276.3)
-
Step 700
700
#4944D8
oklch(49.2% 0.218 276.3)
-
Step 800
800 (this color)
#4243B8
oklch(45.7% 0.18 276.2)
-
Step 900
900
#31348A
oklch(37.8% 0.14 275.9)
-
Step 950
950
#1C1F51
oklch(27% 0.09 276)
#4243B8 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) | #0058BC | 0.062 |
| Deuteranopia (no green cones) | #004EB6 | 0.053 |
| Tritanopia (no blue cones) | #006177 | 0.150 |
| Achromatopsia (no color) | #535353 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4243B8
#4243B8
oklch(45.7% 0.18 276.2)
- #675600
#675600
oklch(45.7% 0.094 95.7)
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 #4243B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue With A Hint Of Purple #533CC6 ΔE 0.035
- Majorelle Blue #3F37C9 ΔE 0.036
- Blue Blue #2242C7 ΔE 0.044
- Blurple #5539CC ΔE 0.045
- Blueberry #464196 ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.056
- Sapphire #2138AB ΔE 0.057
- Purple Blue #5D21D0 ΔE 0.073
Use #4243B8 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.