#55579B
Closest named color: Twilight (#4E518B). oklch(48.8% 0.108 280.3), rgb(85, 87, 155).
Aa
White text reads best on this color (6.51:1).
About this color
#55579B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.108 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 6.51:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #55579B |
| RGB | rgb(85, 87, 155) |
| HSL | hsl(238, 29%, 47%) |
| OKLCH | oklch(48.8% 0.108 280.3) |
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 #55579B | 6.51:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #55579B | 3.22:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #55579B text on white | 6.51:1 | AA | Lc 82.2 | Fine for body text |
| #55579B text on black | 3.22:1 | AA large text | Lc -19.7 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D5D7EC
oklch(88.4% 0.029 281.5)
-
Step 300
300
#BABEE2
oklch(81% 0.051 280.2)
-
Step 400
400
#969BD4
oklch(70.7% 0.083 280.1)
-
Step 500
500
#7D81C9
oklch(63% 0.108 280.4)
-
Step 600
600
#676AB5
oklch(55.6% 0.115 280.2)
-
Step 700
700 (this color)
#55579B
oklch(48.8% 0.108 280.3)
-
Step 800
800
#46487F
oklch(42.7% 0.09 280.3)
-
Step 900
900
#3B3D66
oklch(37.8% 0.07 280.4)
-
Step 950
950
#22243C
oklch(27.1% 0.045 279.3)
#55579B 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) | #3D609E | 0.036 |
| Deuteranopia (no green cones) | #395B99 | 0.037 |
| Tritanopia (no blue cones) | #3E6571 | 0.094 |
| Achromatopsia (no color) | #5E5E5E | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55579B
#55579B
oklch(48.8% 0.108 280.3)
- #6D6000
#6D6000
oklch(48.7% 0.101 100.1)
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 #55579B, closest first.
No curated palette has a color within ΔE 0.04 of #55579B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dusky Blue #475F94 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.039
- Dusk #4E5481 ΔE 0.044
- Denim #3B638C ΔE 0.055
- French Blue #436BAD ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.060
- Dusty Grape #545775 ΔE 0.063
Use #55579B 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.