#5172D8
Closest named color: Royal Blue (#4169E1). oklch(57.9% 0.16 267.7), rgb(81, 114, 216).
Aa
Black text reads best on this color (4.74:1).
About this color
#5172D8 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.160 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.034 away. Black text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #5172D8 |
| RGB | rgb(81, 114, 216) |
| HSL | hsl(225, 63%, 58%) |
| OKLCH | oklch(57.9% 0.16 267.7) |
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 #5172D8 | 4.42:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #5172D8 | 4.74:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #5172D8 text on white | 4.42:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #5172D8 text on black | 4.74:1 | AA | Lc -31.3 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#819EE9
oklch(70.8% 0.115 267.3)
-
Step 500
500
#6383E2
oklch(63% 0.148 268)
-
Step 600
600 (this color)
#5172D8
oklch(57.9% 0.16 267.7)
-
Step 700
700
#3C58B4
oklch(49% 0.149 267.8)
-
Step 800
800
#324992
oklch(42.8% 0.123 267.8)
-
Step 900
900
#2B3E74
oklch(37.8% 0.095 267.2)
-
Step 950
950
#192444
oklch(26.9% 0.062 267.8)
#5172D8 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) | #3F7EDC | 0.033 |
| Deuteranopia (no green cones) | #2572D6 | 0.038 |
| Tritanopia (no blue cones) | #00899A | 0.136 |
| Achromatopsia (no color) | #787878 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5172D8
#5172D8
oklch(57.9% 0.16 267.7)
- #987500
#987500
oklch(58.1% 0.119 87.7)
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 #5172D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.034
- Dark Periwinkle #665FD1 ΔE 0.050
- Windows Blue #3778BF ΔE 0.051
- Neon Blue #4361EE ΔE 0.059
- Cornflower #6A79F7 ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.060
- Clear Blue #247AFD ΔE 0.063
- Slate Blue #6A5ACD ΔE 0.064
Use #5172D8 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.