#5373D9
Closest named color: Royal Blue (#4169E1). oklch(58.3% 0.16 268.1), rgb(83, 115, 217).
Aa
Black text reads best on this color (4.82:1).
About this color
#5373D9 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 0.037 away. Black text reads best on it, at 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #5373D9 |
| RGB | rgb(83, 115, 217) |
| HSL | hsl(226, 64%, 59%) |
| OKLCH | oklch(58.3% 0.16 268.1) |
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 #5373D9 | 4.35:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #5373D9 | 4.82:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #5373D9 text on white | 4.35:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #5373D9 text on black | 4.82:1 | AA | Lc -31.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0F0
oklch(81% 0.071 267.9)
-
Step 400
400
#829DE9
oklch(70.6% 0.116 268.4)
-
Step 500
500
#6383E2
oklch(63% 0.148 268)
-
Step 600
600 (this color)
#5373D9
oklch(58.3% 0.16 268.1)
-
Step 700
700
#3D58B4
oklch(49% 0.149 268.2)
-
Step 800
800
#324992
oklch(42.8% 0.123 267.8)
-
Step 900
900
#2C3E74
oklch(37.8% 0.095 267.8)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#5373D9 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) | #407FDD | 0.033 |
| Deuteranopia (no green cones) | #2873D7 | 0.038 |
| Tritanopia (no blue cones) | #008A9B | 0.137 |
| Achromatopsia (no color) | #797979 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5373D9
#5373D9
oklch(58.3% 0.16 268.1)
- #997600
#997600
oklch(58.4% 0.119 87.8)
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 #5373D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.052
- Windows Blue #3778BF ΔE 0.053
- Cornflower #6A79F7 ΔE 0.056
- Neon Blue #4361EE ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.062
- Clear Blue #247AFD ΔE 0.063
- Soft Blue #6488EA ΔE 0.063
Use #5373D9 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.