#5B64C1
Closest named color: Iris (#6258C4). oklch(54.2% 0.143 276.4), rgb(91, 100, 193).
Aa
White text reads best on this color (5.20:1).
About this color
#5B64C1 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.143 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.031 away. White text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #5B64C1 |
| RGB | rgb(91, 100, 193) |
| HSL | hsl(235, 45%, 56%) |
| OKLCH | oklch(54.2% 0.143 276.4) |
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 #5B64C1 | 5.20:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #5B64C1 | 4.03:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #5B64C1 text on white | 5.20:1 | AA | Lc 75.6 | Fine for body text |
| #5B64C1 text on black | 4.03:1 | AA large text | Lc -26.1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEB
oklch(81% 0.064 276)
-
Step 400
400
#8F9BE1
oklch(70.7% 0.103 276)
-
Step 500
500
#7580D8
oklch(63% 0.132 276.5)
-
Step 600
600 (this color)
#5B64C1
oklch(54.2% 0.143 276.4)
-
Step 700
700
#4E56AB
oklch(49.1% 0.134 276.2)
-
Step 800
800
#40478A
oklch(42.7% 0.11 276.2)
-
Step 900
900
#363C6F
oklch(37.7% 0.087 276.3)
-
Step 950
950
#202341
oklch(27% 0.056 277.7)
#5B64C1 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) | #3971C4 | 0.046 |
| Deuteranopia (no green cones) | #2D69BF | 0.049 |
| Tritanopia (no blue cones) | #2D7889 | 0.126 |
| Achromatopsia (no color) | #6D6D6D | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B64C1
#5B64C1
oklch(54.2% 0.143 276.4)
- #836E00
#836E00
oklch(54.2% 0.111 95.8)
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 #5B64C1, closest first.
No curated palette has a color within ΔE 0.04 of #5B64C1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.032
- Slate Blue #6A5ACD ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.042
- French Blue #436BAD ΔE 0.049
- Royal Blue #4169E1 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.059
- Mid Blue #276AB3 ΔE 0.060
Use #5B64C1 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.