#4174AB
Closest named color: Flat Blue (#3C73A8). oklch(54.8% 0.103 251.8), rgb(65, 116, 171).
Aa
White text reads best on this color (4.87:1).
About this color
#4174AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.103 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.008 away. White text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.31:1 |
| White text | 4.87:1 |
Values
| HEX | #4174AB |
| RGB | rgb(65, 116, 171) |
| HSL | hsl(211, 45%, 46%) |
| OKLCH | oklch(54.8% 0.103 251.8) |
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 #4174AB | 4.87:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #4174AB | 4.31:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #4174AB text on white | 4.87:1 | AA | Lc 73.6 | Content text, not long reading |
| #4174AB text on black | 4.31:1 | AA large text | Lc -28.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ACC3DE
oklch(80.9% 0.046 252.5)
-
Step 400
400
#7FA4CE
oklch(70.7% 0.074 252)
-
Step 500
500
#5E8DC1
oklch(63.1% 0.094 251.8)
-
Step 600
600 (this color)
#4174AB
oklch(54.8% 0.103 251.8)
-
Step 700
700
#356395
oklch(49.1% 0.095 252.1)
-
Step 800
800
#2C5179
oklch(42.7% 0.079 251.8)
-
Step 900
900
#284361
oklch(37.6% 0.061 252.1)
-
Step 950
950
#182839
oklch(27.1% 0.038 250.8)
#4174AB 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) | #5D77AD | 0.034 |
| Deuteranopia (no green cones) | #4E6DAA | 0.022 |
| Tritanopia (no blue cones) | #008188 | 0.084 |
| Achromatopsia (no color) | #717171 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4174AB
#4174AB
oklch(54.8% 0.103 251.8)
- #966621
#966621
oklch(54.9% 0.103 71.7)
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 #4174AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.008
- Muted Blue #3B719F ΔE 0.021
- Dull Blue #49759C ΔE 0.026
- French Blue #436BAD ΔE 0.027
- Nice Blue #107AB0 ΔE 0.030
- Windows Blue #3778BF ΔE 0.031
- Cerulean #457B9D ΔE 0.034
- Stormy Blue #507B9C ΔE 0.039
Use #4174AB 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.