#5375E3
Closest named color: Royal Blue (#4169E1). oklch(59.4% 0.171 268), rgb(83, 117, 227).
Aa
Black text reads best on this color (5.02:1).
About this color
#5375E3 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.171 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.038 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.02:1 |
| White text | 4.18:1 |
Values
| HEX | #5375E3 |
| RGB | rgb(83, 117, 227) |
| HSL | hsl(226, 72%, 61%) |
| OKLCH | oklch(59.4% 0.171 268) |
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 #5375E3 | 4.18:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #5375E3 | 5.02:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #5375E3 text on white | 4.18:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #5375E3 text on black | 5.02:1 | AA | Lc -33.1 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#A9BFF8
oklch(80.8% 0.085 268.1)
-
Step 400
400
#7D9CF4
oklch(70.7% 0.134 268.2)
-
Step 500
500 (this color)
#5375E3
oklch(59.4% 0.171 268)
-
Step 600
600
#4567DE
oklch(55.6% 0.186 267.9)
-
Step 700
700
#3855C1
oklch(49.2% 0.172 268.1)
-
Step 800
800
#2E469C
oklch(42.7% 0.143 268)
-
Step 900
900
#283C7C
oklch(37.7% 0.111 267.7)
-
Step 950
950
#182449
oklch(27.2% 0.071 268)
#5375E3 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) | #3B83E7 | 0.038 |
| Deuteranopia (no green cones) | #1976E1 | 0.043 |
| Tritanopia (no blue cones) | #008EA1 | 0.143 |
| Achromatopsia (no color) | #7C7C7C | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5375E3
#5375E3
oklch(59.4% 0.171 268)
- #9C7900
#9C7900
oklch(59.4% 0.121 88.3)
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 #5375E3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.038
- Cornflower #6A79F7 ΔE 0.043
- Clear Blue #247AFD ΔE 0.051
- Soft Blue #6488EA ΔE 0.055
- Neon Blue #4361EE ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.059
- Medium Slate Blue #7B68EE ΔE 0.061
Use #5375E3 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.