#656ECD
Closest named color: Dark Periwinkle (#665FD1). oklch(57.7% 0.145 276.8), rgb(101, 110, 205).
Aa
Black text reads best on this color (4.66:1).
About this color
#656ECD is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.145 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.038 away. Black text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.66:1 |
| White text | 4.50:1 |
Values
| HEX | #656ECD |
| RGB | rgb(101, 110, 205) |
| HSL | hsl(235, 51%, 60%) |
| OKLCH | oklch(57.7% 0.145 276.8) |
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 #656ECD | 4.50:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #656ECD | 4.66:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #656ECD text on white | 4.50:1 | AA | Lc 71.1 | Content text, not long reading |
| #656ECD text on black | 4.66:1 | AA | Lc -30.6 | Non-text elements, placeholder text |
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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B5BEEB
oklch(81% 0.064 276)
-
Step 400
400
#909AE1
oklch(70.6% 0.104 277.2)
-
Step 500
500
#7680D9
oklch(63.1% 0.133 277)
-
Step 600
600 (this color)
#656ECD
oklch(57.7% 0.145 276.8)
-
Step 700
700
#4F56AB
oklch(49.1% 0.134 276.7)
-
Step 800
800
#41478B
oklch(42.8% 0.111 276.8)
-
Step 900
900
#363C6F
oklch(37.7% 0.087 276.3)
-
Step 950
950
#202341
oklch(27% 0.056 277.7)
#656ECD 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) | #457BD1 | 0.045 |
| Deuteranopia (no green cones) | #3A73CB | 0.048 |
| Tritanopia (no blue cones) | #3A8293 | 0.127 |
| Achromatopsia (no color) | #777777 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #656ECD
#656ECD
oklch(57.7% 0.145 276.8)
- #8E7800
#8E7800
oklch(57.6% 0.119 96.2)
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 #656ECD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.049
- Royal Blue #4169E1 ΔE 0.056
- Iris #6258C4 ΔE 0.056
- Windows Blue #3778BF ΔE 0.060
- Medium Slate Blue #7B68EE ΔE 0.062
- Cornflower #6A79F7 ΔE 0.067
Use #656ECD 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.