#5873B2
Closest named color: Flat Blue (#3C73A8). oklch(56.3% 0.103 265.6), rgb(88, 115, 178).
Aa
White text reads best on this color (4.65:1).
About this color
#5873B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.103 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.035 away. White text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.51:1 |
| White text | 4.65:1 |
Values
| HEX | #5873B2 |
| RGB | rgb(88, 115, 178) |
| HSL | hsl(222, 37%, 52%) |
| OKLCH | oklch(56.3% 0.103 265.6) |
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 #5873B2 | 4.65:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #5873B2 | 4.51:1 | AA | Lc 31.8 | Non-text elements, placeholder text |
| #5873B2 text on white | 4.65:1 | AA | Lc 72.2 | Content text, not long reading |
| #5873B2 text on black | 4.51:1 | AA | Lc -29.5 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1E0
oklch(81% 0.047 264.9)
-
Step 400
400
#8AA0D0
oklch(70.7% 0.075 265.4)
-
Step 500
500
#6E88C3
oklch(63.1% 0.094 265.6)
-
Step 600
600 (this color)
#5873B2
oklch(56.3% 0.103 265.6)
-
Step 700
700
#465E97
oklch(49% 0.096 265.7)
-
Step 800
800
#3A4D7B
oklch(42.7% 0.08 266.1)
-
Step 900
900
#324163
oklch(37.8% 0.062 265.4)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#5873B2 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) | #5B79B5 | 0.018 |
| Deuteranopia (no green cones) | #5171B1 | 0.011 |
| Tritanopia (no blue cones) | #30808A | 0.092 |
| Achromatopsia (no color) | #747474 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5873B2
#5873B2
oklch(56.3% 0.103 265.6)
- #90701F
#90701F
oklch(56.2% 0.103 85.9)
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 #5873B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.035
- French Blue #436BAD ΔE 0.036
- Windows Blue #3778BF ΔE 0.036
- Dull Blue #49759C ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Muted Blue #3B719F ΔE 0.046
- Cool Blue #4984B8 ΔE 0.047
- Stormy Blue #507B9C ΔE 0.048
Use #5873B2 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.