#6437AC
Closest named color: Rebecca Purple (#663399). oklch(45.8% 0.177 296.4), rgb(100, 55, 172).
Aa
White text reads best on this color (7.82:1).
About this color
#6437AC is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.177 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.032 away. White text reads best on it, at 7.82:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #6437AC |
| RGB | rgb(100, 55, 172) |
| HSL | hsl(263, 52%, 45%) |
| OKLCH | oklch(45.8% 0.177 296.4) |
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 #6437AC | 7.82:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #6437AC | 2.68:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #6437AC text on white | 7.82:1 | AAA | Lc 86.6 | Fine for body text |
| #6437AC text on black | 2.68:1 | Fails | Lc -15.5 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#EBE6FC
oklch(93.5% 0.03 296.2)
-
Step 200
200
#DCD2FB
oklch(88.5% 0.057 296.4)
-
Step 300
300
#C7B3FC
oklch(80.9% 0.103 296.6)
-
Step 400
400
#AB87FA
oklch(70.6% 0.166 296.3)
-
Step 500
500
#9964F7
oklch(63.1% 0.211 296.5)
-
Step 600
600
#8544E6
oklch(55.6% 0.229 296.5)
-
Step 700
700
#7134C8
oklch(49.2% 0.213 296.4)
-
Step 800
800 (this color)
#6437AC
oklch(45.8% 0.177 296.4)
-
Step 900
900
#4B2B80
oklch(37.8% 0.137 296.6)
-
Step 950
950
#2B1A4B
oklch(26.9% 0.087 296)
#6437AC 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) | #0053B0 | 0.115 |
| Deuteranopia (no green cones) | #0050AA | 0.115 |
| Tritanopia (no blue cones) | #51536D | 0.136 |
| Achromatopsia (no color) | #525252 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6437AC
#6437AC
oklch(45.8% 0.177 296.4)
- #555E00
#555E00
oklch(45.8% 0.105 116.1)
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 #6437AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.032
- Bluey Purple #6241C7 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Blurple #5539CC ΔE 0.059
- Grape #7209B7 ΔE 0.059
- Blueberry #464196 ΔE 0.065
- Purple Blue #5D21D0 ΔE 0.067
- Chrysanthemum #560BAD ΔE 0.068
Use #6437AC 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.