#4247A5
Closest named color: Blueberry (#464196). oklch(44.8% 0.149 276.3), rgb(66, 71, 165).
Aa
White text reads best on this color (7.84:1).
About this color
#4247A5 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.149 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.028 away. White text reads best on it, at 7.84:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #4247A5 |
| RGB | rgb(66, 71, 165) |
| HSL | hsl(237, 43%, 45%) |
| OKLCH | oklch(44.8% 0.149 276.3) |
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 #4247A5 | 7.84:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #4247A5 | 2.67:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #4247A5 text on white | 7.84:1 | AAA | Lc 86.9 | Fine for body text |
| #4247A5 text on black | 2.67:1 | Fails | Lc -15.2 | 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 800.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B1BCF9
oklch(80.8% 0.087 276.4)
-
Step 400
400
#8A97F6
oklch(70.6% 0.139 276.3)
-
Step 500
500
#707AF2
oklch(63.1% 0.177 276.5)
-
Step 600
600
#5A5FE1
oklch(55.5% 0.194 276.4)
-
Step 700
700
#4A4EC4
oklch(49.1% 0.18 276)
-
Step 800
800 (this color)
#4247A5
oklch(44.8% 0.149 276.3)
-
Step 900
900
#33387E
oklch(37.7% 0.117 276.2)
-
Step 950
950
#1E214A
oklch(27% 0.075 277)
#4247A5 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) | #0056A8 | 0.057 |
| Deuteranopia (no green cones) | #004EA3 | 0.053 |
| Tritanopia (no blue cones) | #005D6F | 0.128 |
| Achromatopsia (no color) | #525252 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4247A5
#4247A5
oklch(44.8% 0.149 276.3)
- #645400
#645400
oklch(44.8% 0.092 96.3)
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 #4247A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.028
- Dark Slate Blue #483D8B ΔE 0.048
- Cobalt #1E488F ΔE 0.056
- Twilight #4E518B ΔE 0.057
- Sapphire #2138AB ΔE 0.060
- Dusk Blue #26538D ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.066
Use #4247A5 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.