#5173DE
Closest named color: Royal Blue (#4169E1). oklch(58.5% 0.167 267.7), rgb(81, 115, 222).
Aa
Black text reads best on this color (4.85:1).
About this color
#5173DE is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.167 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.033 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #5173DE |
| RGB | rgb(81, 115, 222) |
| HSL | hsl(226, 68%, 59%) |
| OKLCH | oklch(58.5% 0.167 267.7) |
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 #5173DE | 4.32:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #5173DE | 4.85:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #5173DE text on white | 4.32:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #5173DE text on black | 4.85:1 | AA | Lc -32.0 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#ABC0F2
oklch(80.9% 0.075 267)
-
Step 400
400
#809DEC
oklch(70.7% 0.121 267.9)
-
Step 500
500
#6183E6
oklch(63.2% 0.154 267.6)
-
Step 600
600 (this color)
#5173DE
oklch(58.5% 0.167 267.7)
-
Step 700
700
#3B58B8
oklch(49.2% 0.155 267.7)
-
Step 800
800
#304895
oklch(42.7% 0.13 267.6)
-
Step 900
900
#2A3D76
oklch(37.6% 0.1 267.6)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#5173DE 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) | #3B80E2 | 0.035 |
| Deuteranopia (no green cones) | #1B73DC | 0.042 |
| Tritanopia (no blue cones) | #008C9E | 0.141 |
| Achromatopsia (no color) | #797979 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5173DE
#5173DE
oklch(58.5% 0.167 267.7)
- #9A7600
#9A7600
oklch(58.5% 0.12 87.2)
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 #5173DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.033
- Cornflower #6A79F7 ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.054
- Clear Blue #247AFD ΔE 0.056
- Neon Blue #4361EE ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Soft Blue #6488EA ΔE 0.062
Use #5173DE 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.