#656CEC
Closest named color: Medium Slate Blue (#7B68EE). oklch(59.4% 0.19 276.6), rgb(101, 108, 236).
Aa
Black text reads best on this color (4.90:1).
About this color
#656CEC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.190 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.032 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #656CEC |
| RGB | rgb(101, 108, 236) |
| HSL | hsl(237, 78%, 66%) |
| OKLCH | oklch(59.4% 0.19 276.6) |
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 #656CEC | 4.27:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #656CEC | 4.90:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #656CEC text on white | 4.27:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #656CEC text on black | 4.90:1 | AA | Lc -32.4 | 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 500.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FC
oklch(88.6% 0.052 276.9)
-
Step 300
300
#B1BCFD
oklch(81% 0.093 276.7)
-
Step 400
400
#8996FC
oklch(70.7% 0.149 276.4)
-
Step 500
500 (this color)
#656CEC
oklch(59.4% 0.19 276.6)
-
Step 600
600
#5A5CE8
oklch(55.5% 0.207 276.7)
-
Step 700
700
#4B4BCA
oklch(49.2% 0.192 276.7)
-
Step 800
800
#3D3EA3
oklch(42.6% 0.159 276.8)
-
Step 900
900
#333781
oklch(37.8% 0.123 276.5)
-
Step 950
950
#1E214C
oklch(27.1% 0.078 276.8)
#656CEC 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) | #1180F0 | 0.073 |
| Deuteranopia (no green cones) | #0075E9 | 0.072 |
| Tritanopia (no blue cones) | #068AA2 | 0.166 |
| Achromatopsia (no color) | #7A7A7A | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #656CEC
#656CEC
oklch(59.4% 0.19 276.6)
- #947D00
#947D00
oklch(59.3% 0.122 96.1)
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 #656CEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.032
- Cornflower #6A79F7 ΔE 0.035
- Royal Blue #4169E1 ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.049
- Neon Blue #4361EE ΔE 0.052
- Light Indigo #6D5ACF ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.060
- Clear Blue #247AFD ΔE 0.065
Use #656CEC 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.