#4F64D9
Closest named color: Royal Blue (#4169E1). oklch(55.1% 0.18 271.6), rgb(79, 100, 217).
Aa
White text reads best on this color (5.05:1).
About this color
#4F64D9 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.180 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.021 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #4F64D9 |
| RGB | rgb(79, 100, 217) |
| HSL | hsl(231, 64%, 58%) |
| OKLCH | oklch(55.1% 0.18 271.6) |
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 #4F64D9 | 5.05:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #4F64D9 | 4.15:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #4F64D9 text on white | 5.05:1 | AA | Lc 74.5 | Content text, not long reading |
| #4F64D9 text on black | 4.15:1 | AA large text | Lc -27.2 | 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
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#AEBEF6
oklch(80.9% 0.081 272.1)
-
Step 400
400
#849BF1
oklch(70.8% 0.129 271.4)
-
Step 500
500
#677FEC
oklch(63.1% 0.165 271.6)
-
Step 600
600 (this color)
#4F64D9
oklch(55.1% 0.18 271.6)
-
Step 700
700
#4153BE
oklch(49% 0.168 271.6)
-
Step 800
800
#364599
oklch(42.7% 0.138 271.7)
-
Step 900
900
#2E3B7A
oklch(37.7% 0.108 271.6)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#4F64D9 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) | #0D75DD | 0.055 |
| Deuteranopia (no green cones) | #0069D7 | 0.051 |
| Tritanopia (no blue cones) | #008095 | 0.151 |
| Achromatopsia (no color) | #6F6F6F | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F64D9
#4F64D9
oklch(55.1% 0.18 271.6)
- #8A6F00
#8A6F00
oklch(55.2% 0.113 91.9)
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 #4F64D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.021
- Warm Blue #4B57DB ΔE 0.032
- Dark Periwinkle #665FD1 ΔE 0.033
- Neon Blue #4361EE ΔE 0.036
- Slate Blue #6A5ACD ΔE 0.044
- Iris #6258C4 ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.047
- Cerulean Blue #056EEE ΔE 0.056
Use #4F64D9 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.