#4170B8
Closest named color: French Blue (#436BAD). oklch(54.7% 0.124 258.7), rgb(65, 112, 184).
Aa
White text reads best on this color (4.95:1).
About this color
#4170B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.124 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.020 away. White text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.23:1 |
| White text | 4.95:1 |
Values
| HEX | #4170B8 |
| RGB | rgb(65, 112, 184) |
| HSL | hsl(216, 48%, 49%) |
| OKLCH | oklch(54.7% 0.124 258.7) |
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 #4170B8 | 4.95:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #4170B8 | 4.23:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #4170B8 text on white | 4.95:1 | AA | Lc 74.1 | Content text, not long reading |
| #4170B8 text on black | 4.23:1 | AA large text | Lc -27.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E5
oklch(80.9% 0.056 258.7)
-
Step 400
400
#7EA2D8
oklch(70.6% 0.089 258.3)
-
Step 500
500
#5E8ACE
oklch(63.1% 0.114 258.8)
-
Step 600
600 (this color)
#4170B8
oklch(54.7% 0.124 258.7)
-
Step 700
700
#3560A1
oklch(49.1% 0.115 258.5)
-
Step 800
800
#2D4F83
oklch(42.9% 0.095 258.6)
-
Step 900
900
#284269
oklch(37.8% 0.074 258.3)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#4170B8 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) | #5076BB | 0.025 |
| Deuteranopia (no green cones) | #3F6BB7 | 0.014 |
| Tritanopia (no blue cones) | #00808B | 0.101 |
| Achromatopsia (no color) | #707070 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4170B8
#4170B8
oklch(54.7% 0.124 258.7)
- #946700
#946700
oklch(54.7% 0.114 78.6)
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 #4170B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.020
- Windows Blue #3778BF ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.029
- Mid Blue #276AB3 ΔE 0.031
- Muted Blue #3B719F ΔE 0.042
- Nice Blue #107AB0 ΔE 0.042
- Dull Blue #49759C ΔE 0.050
- Steel Blue #4682B4 ΔE 0.054
Use #4170B8 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.