#665E90
Closest named color: Dusky Blue (#475F94). oklch(51% 0.079 290.7), rgb(102, 94, 144).
Aa
White text reads best on this color (5.88:1).
About this color
#665E90 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 51%, its chroma 0.079 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.044 away. White text reads best on it, at 5.88:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.079) |
| Temperature | in between |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #665E90 |
| RGB | rgb(102, 94, 144) |
| HSL | hsl(250, 21%, 47%) |
| OKLCH | oklch(51% 0.079 290.7) |
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 #665E90 | 5.88:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #665E90 | 3.56:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #665E90 text on white | 5.88:1 | AA | Lc 79.4 | Fine for body text |
| #665E90 text on black | 3.56:1 | AA large text | Lc -22.4 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F1
oklch(93.6% 0.011 286.2)
-
Step 200
200
#D9D7E6
oklch(88.5% 0.021 292.1)
-
Step 300
300
#C0BDD8
oklch(80.9% 0.038 290.6)
-
Step 400
400
#A09AC4
oklch(70.6% 0.061 291.3)
-
Step 500
500
#8981B5
oklch(63% 0.078 291)
-
Step 600
600
#736AA1
oklch(55.5% 0.085 290.9)
-
Step 700
700 (this color)
#665E90
oklch(51% 0.079 290.7)
-
Step 800
800
#4F4970
oklch(42.8% 0.064 290.5)
-
Step 900
900
#413D5B
oklch(37.7% 0.051 289.8)
-
Step 950
950
#262435
oklch(27% 0.031 289.5)
#665E90 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) | #506592 | 0.035 |
| Deuteranopia (no green cones) | #51638F | 0.033 |
| Tritanopia (no blue cones) | #5D6770 | 0.067 |
| Achromatopsia (no color) | #646464 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665E90
#665E90
oklch(51% 0.079 290.7)
- #686A32
#686A32
oklch(50.9% 0.078 110.7)
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 #665E90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.044
- Muted Purple #805B87 ΔE 0.045
- Dusty Purple #825F87 ΔE 0.049
- Dusk #4E5481 ΔE 0.053
- Dusty Grape #545775 ΔE 0.054
- Twilight #4E518B ΔE 0.055
- Dull Purple #84597E ΔE 0.056
- Denim #3B638C ΔE 0.059
Use #665E90 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.