#5174A8
Closest named color: Flat Blue (#3C73A8). oklch(55.5% 0.091 258.1), rgb(81, 116, 168).
Aa
White text reads best on this color (4.75:1).
About this color
#5174A8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.091 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.022 away. White text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.41:1 |
| White text | 4.75:1 |
Values
| HEX | #5174A8 |
| RGB | rgb(81, 116, 168) |
| HSL | hsl(216, 35%, 49%) |
| OKLCH | oklch(55.5% 0.091 258.1) |
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 #5174A8 | 4.75:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #5174A8 | 4.41:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #5174A8 text on white | 4.75:1 | AA | Lc 72.9 | Content text, not long reading |
| #5174A8 text on black | 4.41:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B1C2DC
oklch(81% 0.041 258.8)
-
Step 400
400
#88A2CA
oklch(70.7% 0.066 258.9)
-
Step 500
500
#6A8BBC
oklch(63.1% 0.083 258.1)
-
Step 600
600 (this color)
#5174A8
oklch(55.5% 0.091 258.1)
-
Step 700
700
#426190
oklch(49% 0.084 258.5)
-
Step 800
800
#365075
oklch(42.8% 0.07 257.2)
-
Step 900
900
#2F425E
oklch(37.6% 0.054 257.9)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#5174A8 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) | #6077AA | 0.021 |
| Deuteranopia (no green cones) | #556FA7 | 0.014 |
| Tritanopia (no blue cones) | #277F86 | 0.081 |
| Achromatopsia (no color) | #737373 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5174A8
#5174A8
oklch(55.5% 0.091 258.1)
- #906C2F
#906C2F
oklch(55.5% 0.09 78.1)
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 #5174A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.022
- Dull Blue #49759C ΔE 0.023
- Muted Blue #3B719F ΔE 0.030
- Stormy Blue #507B9C ΔE 0.032
- Cerulean #457B9D ΔE 0.032
- French Blue #436BAD ΔE 0.034
- Steel Blue #4682B4 ΔE 0.040
- Windows Blue #3778BF ΔE 0.040
Use #5174A8 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.