#5374B2
Closest named color: Flat Blue (#3C73A8). oklch(56.2% 0.104 262.2), rgb(83, 116, 178).
Aa
White text reads best on this color (4.65:1).
About this color
#5374B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.104 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.030 away. White text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.50:1 |
| White text | 4.65:1 |
Values
| HEX | #5374B2 |
| RGB | rgb(83, 116, 178) |
| HSL | hsl(219, 38%, 51%) |
| OKLCH | oklch(56.2% 0.104 262.2) |
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 #5374B2 | 4.65:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #5374B2 | 4.50:1 | AA | Lc 31.9 | Non-text elements, placeholder text |
| #5374B2 text on white | 4.65:1 | AA | Lc 72.2 | Content text, not long reading |
| #5374B2 text on black | 4.50:1 | 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
#D0DAEB
oklch(88.6% 0.026 261.1)
-
Step 300
300
#B0C1E0
oklch(80.8% 0.048 262.5)
-
Step 400
400
#87A1D0
oklch(70.7% 0.075 262.1)
-
Step 500
500
#6A89C4
oklch(63.1% 0.096 262.7)
-
Step 600
600 (this color)
#5374B2
oklch(56.2% 0.104 262.2)
-
Step 700
700
#426097
oklch(49.2% 0.096 261.8)
-
Step 800
800
#374E7B
oklch(42.7% 0.08 262.9)
-
Step 900
900
#2F4163
oklch(37.6% 0.063 262.4)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#5374B2 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) | #5070B1 | 0.012 |
| Tritanopia (no blue cones) | #22828B | 0.093 |
| Achromatopsia (no color) | #747474 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5374B2
#5374B2
oklch(56.2% 0.104 262.2)
- #936E1E
#936E1E
oklch(56.1% 0.104 82.1)
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 #5374B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.030
- Windows Blue #3778BF ΔE 0.031
- French Blue #436BAD ΔE 0.033
- Dull Blue #49759C ΔE 0.038
- Steel Blue #4682B4 ΔE 0.039
- Muted Blue #3B719F ΔE 0.042
- Cool Blue #4984B8 ΔE 0.044
- Stormy Blue #507B9C ΔE 0.045
Use #5374B2 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.