#5F64D7
Closest named color: Dark Periwinkle (#665FD1). oklch(56% 0.173 277.4), rgb(95, 100, 215).
Aa
White text reads best on this color (4.89:1).
About this color
#5F64D7 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.173 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.016 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.29:1 |
| White text | 4.89:1 |
Values
| HEX | #5F64D7 |
| RGB | rgb(95, 100, 215) |
| HSL | hsl(238, 60%, 61%) |
| OKLCH | oklch(56% 0.173 277.4) |
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 #5F64D7 | 4.89:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #5F64D7 | 4.29:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #5F64D7 text on white | 4.89:1 | AA | Lc 73.6 | Content text, not long reading |
| #5F64D7 text on black | 4.29:1 | AA large text | Lc -28.1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B4BDF3
oklch(81% 0.077 277.2)
-
Step 400
400
#8E98ED
oklch(70.7% 0.124 277.6)
-
Step 500
500
#747CE7
oklch(63% 0.159 277.6)
-
Step 600
600 (this color)
#5F64D7
oklch(56% 0.173 277.4)
-
Step 700
700
#4E51B9
oklch(49.1% 0.161 277.5)
-
Step 800
800
#404396
oklch(42.8% 0.133 277.6)
-
Step 900
900
#353977
oklch(37.6% 0.104 277.4)
-
Step 950
950
#1F2246
oklch(27% 0.066 277.4)
#5F64D7 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) | #1D76DB | 0.067 |
| Deuteranopia (no green cones) | #006CD5 | 0.070 |
| Tritanopia (no blue cones) | #1D7E94 | 0.150 |
| Achromatopsia (no color) | #717171 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F64D7
#5F64D7
oklch(56% 0.173 277.4)
- #877400
#877400
oklch(56% 0.116 97.7)
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 #5F64D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.016
- Slate Blue #6A5ACD ΔE 0.030
- Light Indigo #6D5ACF ΔE 0.031
- Royal Blue #4169E1 ΔE 0.038
- Iris #6258C4 ΔE 0.039
- Warm Blue #4B57DB ΔE 0.044
- Neon Blue #4361EE ΔE 0.050
- Medium Slate Blue #7B68EE ΔE 0.055
Use #5F64D7 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.