#5371AA
Closest named color: Flat Blue (#3C73A8). oklch(55.1% 0.096 262.5), rgb(83, 113, 170).
Aa
White text reads best on this color (4.87:1).
About this color
#5371AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.096 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.025 away. White text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.31:1 |
| White text | 4.87:1 |
Values
| HEX | #5371AA |
| RGB | rgb(83, 113, 170) |
| HSL | hsl(219, 34%, 50%) |
| OKLCH | oklch(55.1% 0.096 262.5) |
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 #5371AA | 4.87:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #5371AA | 4.31:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #5371AA text on white | 4.87:1 | AA | Lc 73.7 | Content text, not long reading |
| #5371AA text on black | 4.31:1 | AA large text | Lc -28.0 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAEA
oklch(88.6% 0.024 262.1)
-
Step 300
300
#B2C1DD
oklch(80.9% 0.043 263)
-
Step 400
400
#8AA1CC
oklch(70.7% 0.068 262.8)
-
Step 500
500
#6C89BF
oklch(63% 0.088 262.4)
-
Step 600
600 (this color)
#5371AA
oklch(55.1% 0.096 262.5)
-
Step 700
700
#456093
oklch(49.1% 0.088 262.4)
-
Step 800
800
#394E78
oklch(42.6% 0.075 263.3)
-
Step 900
900
#314160
oklch(37.6% 0.057 263)
-
Step 950
950
#1D2638
oklch(26.9% 0.036 263.7)
#5371AA 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) | #5B76AC | 0.018 |
| Deuteranopia (no green cones) | #516DA9 | 0.012 |
| Tritanopia (no blue cones) | #2B7D86 | 0.085 |
| Achromatopsia (no color) | #717171 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5371AA
#5371AA
oklch(55.1% 0.096 262.5)
- #8D6C26
#8D6C26
oklch(55.1% 0.096 82.8)
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 #5371AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.025
- French Blue #436BAD ΔE 0.028
- Dull Blue #49759C ΔE 0.030
- Muted Blue #3B719F ΔE 0.032
- Windows Blue #3778BF ΔE 0.040
- Stormy Blue #507B9C ΔE 0.041
- Cerulean #457B9D ΔE 0.042
- Steel Blue #4682B4 ΔE 0.047
Use #5371AA 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.