#4270AF
Closest named color: French Blue (#436BAD). oklch(54.2% 0.111 256.7), rgb(66, 112, 175).
Aa
White text reads best on this color (5.03:1).
About this color
#4270AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.111 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.014 away. White text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.16:1 |
| White text | 5.03:1 |
Values
| HEX | #4270AF |
| RGB | rgb(66, 112, 175) |
| HSL | hsl(215, 45%, 47%) |
| OKLCH | oklch(54.2% 0.111 256.7) |
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 #4270AF | 5.03:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #4270AF | 4.16:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #4270AF text on white | 5.03:1 | AA | Lc 74.6 | Content text, not long reading |
| #4270AF text on black | 4.16:1 | AA large text | Lc -27.1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ACC2E1
oklch(80.8% 0.05 257)
-
Step 400
400
#80A3D3
oklch(70.8% 0.081 256.4)
-
Step 500
500
#608BC7
oklch(63.1% 0.103 256.9)
-
Step 600
600 (this color)
#4270AF
oklch(54.2% 0.111 256.7)
-
Step 700
700
#37619A
oklch(49% 0.103 256.5)
-
Step 800
800
#2E507D
oklch(42.8% 0.085 256)
-
Step 900
900
#294265
oklch(37.6% 0.068 257)
-
Step 950
950
#19273B
oklch(27% 0.042 257.3)
#4270AF 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) | #5574B2 | 0.026 |
| Deuteranopia (no green cones) | #466AAE | 0.017 |
| Tritanopia (no blue cones) | #007E87 | 0.093 |
| Achromatopsia (no color) | #6F6F6F | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4270AF
#4270AF
oklch(54.2% 0.111 256.7)
- #936507
#936507
oklch(54.2% 0.111 76.9)
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 #4270AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.014
- Flat Blue #3C73A8 ΔE 0.016
- Muted Blue #3B719F ΔE 0.028
- Windows Blue #3778BF ΔE 0.030
- Mid Blue #276AB3 ΔE 0.032
- Dull Blue #49759C ΔE 0.037
- Nice Blue #107AB0 ΔE 0.038
- Cerulean #457B9D ΔE 0.048
Use #4270AF 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.