#604E91
Closest named color: Twilight (#4E518B). oklch(47.3% 0.106 294.3), rgb(96, 78, 145).
Aa
White text reads best on this color (7.00:1).
About this color
#604E91 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.106 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 7.00:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #604E91 |
| RGB | rgb(96, 78, 145) |
| HSL | hsl(256, 30%, 44%) |
| OKLCH | oklch(47.3% 0.106 294.3) |
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 #604E91 | 7.00:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #604E91 | 2.99:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #604E91 text on white | 7.00:1 | AAA | Lc 84.2 | Fine for body text |
| #604E91 text on black | 2.99:1 | Fails | Lc -17.8 | 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 700.
-
Step 50
50
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F3
oklch(93.6% 0.015 294.5)
-
Step 200
200
#DAD6EB
oklch(88.6% 0.029 294.5)
-
Step 300
300
#C2BBDF
oklch(80.9% 0.051 294.2)
-
Step 400
400
#A397CF
oklch(70.7% 0.082 294)
-
Step 500
500
#8D7CC3
oklch(63% 0.106 294.2)
-
Step 600
600
#7864AF
oklch(55.5% 0.115 294.6)
-
Step 700
700 (this color)
#604E91
oklch(47.3% 0.106 294.3)
-
Step 800
800
#52447A
oklch(42.6% 0.088 294.3)
-
Step 900
900
#443A62
oklch(37.7% 0.068 294.4)
-
Step 950
950
#28223A
oklch(27.1% 0.044 294.7)
#604E91 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) | #385A93 | 0.061 |
| Deuteranopia (no green cones) | #3B588F | 0.058 |
| Tritanopia (no blue cones) | #555B68 | 0.087 |
| Achromatopsia (no color) | #595959 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #604E91
#604E91
oklch(47.3% 0.106 294.3)
- #5B6201
#5B6201
oklch(47.4% 0.107 114.5)
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 #604E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dusk #4E5481 ΔE 0.044
- Dusky Blue #475F94 ΔE 0.055
- Blueberry #464196 ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.060
- Dusty Grape #545775 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.064
- Rebecca Purple #663399 ΔE 0.066
Use #604E91 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.