#5175D9
Closest named color: Royal Blue (#4169E1). oklch(58.6% 0.158 266.7), rgb(81, 117, 217).
Aa
Black text reads best on this color (4.89:1).
About this color
#5175D9 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.158 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.040 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.89:1 |
| White text | 4.28:1 |
Values
| HEX | #5175D9 |
| RGB | rgb(81, 117, 217) |
| HSL | hsl(224, 64%, 58%) |
| OKLCH | oklch(58.6% 0.158 266.7) |
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 #5175D9 | 4.28:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #5175D9 | 4.89:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #5175D9 text on white | 4.28:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #5175D9 text on black | 4.89:1 | AA | Lc -32.3 | 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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#809EE8
oklch(70.7% 0.114 266.7)
-
Step 500
500
#6184E1
oklch(63.1% 0.146 266.7)
-
Step 600
600 (this color)
#5175D9
oklch(58.6% 0.158 266.7)
-
Step 700
700
#3A59B3
oklch(49% 0.147 266.6)
-
Step 800
800
#304991
oklch(42.6% 0.123 266.8)
-
Step 900
900
#2A3E74
oklch(37.7% 0.096 266.6)
-
Step 950
950
#192544
oklch(27.1% 0.06 266.5)
#5175D9 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) | #4481DD | 0.031 |
| Deuteranopia (no green cones) | #2C74D7 | 0.033 |
| Tritanopia (no blue cones) | #008C9C | 0.135 |
| Achromatopsia (no color) | #7A7A7A | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5175D9
#5175D9
oklch(58.6% 0.158 266.7)
- #9B7600
#9B7600
oklch(58.6% 0.12 86.6)
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 #5175D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.040
- Windows Blue #3778BF ΔE 0.050
- Cornflower #6A79F7 ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.057
- Soft Blue #6488EA ΔE 0.060
- Clear Blue #247AFD ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.062
- Neon Blue #4361EE ΔE 0.064
Use #5175D9 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.