#5371EC
Closest named color: Royal Blue (#4169E1). oklch(59.2% 0.188 269.5), rgb(83, 113, 236).
Aa
Black text reads best on this color (4.94:1).
About this color
#5371EC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.188 and its hue 270°. 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 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.94:1 |
| White text | 4.25:1 |
Values
| HEX | #5371EC |
| RGB | rgb(83, 113, 236) |
| HSL | hsl(228, 80%, 63%) |
| OKLCH | oklch(59.2% 0.188 269.5) |
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 #5371EC | 4.25:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #5371EC | 4.94:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #5371EC text on white | 4.25:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #5371EC text on black | 4.94:1 | AA | Lc -32.7 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBFF8
oklch(81% 0.084 269.5)
-
Step 400
400
#7F9BF5
oklch(70.7% 0.136 269.6)
-
Step 500
500
#617FF1
oklch(63.1% 0.174 269.8)
-
Step 600
600 (this color)
#5371EC
oklch(59.2% 0.188 269.5)
-
Step 700
700
#3B53C2
oklch(49% 0.175 269.6)
-
Step 800
800
#31459D
oklch(42.7% 0.145 269.6)
-
Step 900
900
#2A3B7D
oklch(37.7% 0.114 269.4)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#5371EC 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) | #2182F0 | 0.050 |
| Deuteranopia (no green cones) | #0074E9 | 0.049 |
| Tritanopia (no blue cones) | #008EA4 | 0.156 |
| Achromatopsia (no color) | #7B7B7B | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5371EC
#5371EC
oklch(59.2% 0.188 269.5)
- #9A7900
#9A7900
oklch(59.1% 0.121 89.5)
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 #5371EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.034
- Cornflower #6A79F7 ΔE 0.040
- Clear Blue #247AFD ΔE 0.044
- Neon Blue #4361EE ΔE 0.045
- Cerulean Blue #056EEE ΔE 0.052
- Medium Slate Blue #7B68EE ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.059
- Soft Blue #6488EA ΔE 0.065
Use #5371EC 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.