#665DC5
Closest named color: Iris (#6258C4). oklch(54% 0.157 283.7), rgb(102, 93, 197).
Aa
White text reads best on this color (5.33:1).
About this color
#665DC5 is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.157 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.014 away. White text reads best on it, at 5.33:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #665DC5 |
| RGB | rgb(102, 93, 197) |
| HSL | hsl(245, 47%, 57%) |
| OKLCH | oklch(54% 0.157 283.7) |
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 #665DC5 | 5.33:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #665DC5 | 3.93:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #665DC5 text on white | 5.33:1 | AA | Lc 76.3 | Fine for body text |
| #665DC5 text on black | 3.93:1 | AA large text | Lc -25.4 | 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 600.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F3
oklch(88.4% 0.04 284)
-
Step 300
300
#BABBED
oklch(80.8% 0.07 283.8)
-
Step 400
400
#9897E5
oklch(70.8% 0.113 283.7)
-
Step 500
500
#807BDD
oklch(63.1% 0.144 283.8)
-
Step 600
600 (this color)
#665DC5
oklch(54% 0.157 283.7)
-
Step 700
700
#5950AF
oklch(49% 0.146 283.9)
-
Step 800
800
#49428E
oklch(42.7% 0.122 284.2)
-
Step 900
900
#3C3971
oklch(37.7% 0.093 283.4)
-
Step 950
950
#232242
oklch(27.1% 0.058 283.2)
#665DC5 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) | #286EC9 | 0.074 |
| Deuteranopia (no green cones) | #2268C3 | 0.075 |
| Tritanopia (no blue cones) | #447488 | 0.134 |
| Achromatopsia (no color) | #6B6B6B | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665DC5
#665DC5
oklch(54% 0.157 283.7)
- #7A7100
#7A7100
oklch(54% 0.114 104)
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 #665DC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.014
- Slate Blue #6A5ACD ΔE 0.016
- Dark Periwinkle #665FD1 ΔE 0.019
- Light Indigo #6D5ACF ΔE 0.020
- Warm Blue #4B57DB ΔE 0.055
- Royal Blue #4169E1 ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.064
- Deep Lavender #8D5EB7 ΔE 0.069
Use #665DC5 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.