#5375AC
Closest named color: Flat Blue (#3C73A8). oklch(56.1% 0.094 259.7), rgb(83, 117, 172).
Aa
White text reads best on this color (4.65:1).
About this color
#5375AC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.094 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.027 away. White text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.50:1 |
| White text | 4.65:1 |
Values
| HEX | #5375AC |
| RGB | rgb(83, 117, 172) |
| HSL | hsl(217, 35%, 50%) |
| OKLCH | oklch(56.1% 0.094 259.7) |
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 #5375AC | 4.65:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #5375AC | 4.50:1 | AA | Lc 31.8 | Non-text elements, placeholder text |
| #5375AC text on white | 4.65:1 | AA | Lc 72.2 | Content text, not long reading |
| #5375AC text on black | 4.50:1 | AA | Lc -29.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DD
oklch(81% 0.043 259.6)
-
Step 400
400
#88A2CC
oklch(70.8% 0.068 259.9)
-
Step 500
500
#6A8ABE
oklch(63% 0.087 259.9)
-
Step 600
600 (this color)
#5375AC
oklch(56.1% 0.094 259.7)
-
Step 700
700
#426192
oklch(49.1% 0.087 259.2)
-
Step 800
800
#374F77
oklch(42.7% 0.073 260.2)
-
Step 900
900
#2F4260
oklch(37.7% 0.057 259.3)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#5375AC 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) | #6079AE | 0.021 |
| Deuteranopia (no green cones) | #5570AB | 0.014 |
| Tritanopia (no blue cones) | #288189 | 0.084 |
| Achromatopsia (no color) | #747474 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5375AC
#5375AC
oklch(56.1% 0.094 259.7)
- #926E2C
#926E2C
oklch(56.1% 0.094 79.7)
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 #5375AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.027
- Dull Blue #49759C ΔE 0.029
- Stormy Blue #507B9C ΔE 0.035
- Muted Blue #3B719F ΔE 0.036
- Cerulean #457B9D ΔE 0.036
- French Blue #436BAD ΔE 0.036
- Steel Blue #4682B4 ΔE 0.036
- Windows Blue #3778BF ΔE 0.037
Use #5375AC 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.