#5373AD
Closest named color: Flat Blue (#3C73A8). oklch(55.7% 0.098 261.7), rgb(83, 115, 173).
Aa
White text reads best on this color (4.74:1).
About this color
#5373AD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.098 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.026 away. White text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #5373AD |
| RGB | rgb(83, 115, 173) |
| HSL | hsl(219, 35%, 50%) |
| OKLCH | oklch(55.7% 0.098 261.7) |
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 #5373AD | 4.74:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #5373AD | 4.42:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #5373AD text on white | 4.74:1 | AA | Lc 72.8 | Content text, not long reading |
| #5373AD text on black | 4.42:1 | AA large text | Lc -28.8 | Dividers and decoration only |
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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B1C1DE
oklch(80.8% 0.045 262.4)
-
Step 400
400
#88A1CD
oklch(70.6% 0.071 261.6)
-
Step 500
500
#6B8AC0
oklch(63.2% 0.089 261.2)
-
Step 600
600 (this color)
#5373AD
oklch(55.7% 0.098 261.7)
-
Step 700
700
#436094
oklch(49.1% 0.091 261.4)
-
Step 800
800
#374F78
oklch(42.8% 0.075 260.7)
-
Step 900
900
#304161
oklch(37.6% 0.059 262.4)
-
Step 950
950
#1C2639
oklch(26.9% 0.038 262.7)
#5373AD 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) | #5C78AF | 0.019 |
| Deuteranopia (no green cones) | #526FAC | 0.011 |
| Tritanopia (no blue cones) | #278088 | 0.088 |
| Achromatopsia (no color) | #737373 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5373AD
#5373AD
oklch(55.7% 0.098 261.7)
- #906D25
#906D25
oklch(55.6% 0.098 81.9)
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 #5373AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.026
- French Blue #436BAD ΔE 0.031
- Dull Blue #49759C ΔE 0.032
- Muted Blue #3B719F ΔE 0.036
- Windows Blue #3778BF ΔE 0.036
- Stormy Blue #507B9C ΔE 0.040
- Cerulean #457B9D ΔE 0.041
- Steel Blue #4682B4 ΔE 0.042
Use #5373AD 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.