#4285AF
Closest named color: Steel Blue (#4682B4). oklch(59.1% 0.094 238.7), rgb(66, 133, 175).
Aa
Black text reads best on this color (5.20:1).
About this color
#4285AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.094 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.014 away. Black text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.20:1 |
| White text | 4.03:1 |
Values
| HEX | #4285AF |
| RGB | rgb(66, 133, 175) |
| HSL | hsl(203, 45%, 47%) |
| OKLCH | oklch(59.1% 0.094 238.7) |
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 #4285AF | 4.03:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #4285AF | 5.20:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #4285AF text on white | 4.03:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #4285AF text on black | 5.20:1 | AA | Lc -34.3 | Non-text elements, placeholder text |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#A8C5D9
oklch(80.8% 0.042 238.2)
-
Step 400
400
#79A7C6
oklch(70.7% 0.067 238.4)
-
Step 500
500
#5591B8
oklch(63.2% 0.086 238.7)
-
Step 600
600 (this color)
#4285AF
oklch(59.1% 0.094 238.7)
-
Step 700
700
#29678C
oklch(49.1% 0.087 238.4)
-
Step 800
800
#235472
oklch(42.6% 0.072 238.6)
-
Step 900
900
#22465C
oklch(37.8% 0.056 237.6)
-
Step 950
950
#152936
oklch(27% 0.036 238.5)
#4285AF 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) | #7285B1 | 0.053 |
| Deuteranopia (no green cones) | #637AAE | 0.043 |
| Tritanopia (no blue cones) | #009093 | 0.069 |
| Achromatopsia (no color) | #7E7E7E | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4285AF
#4285AF
oklch(59.1% 0.094 238.7)
- #A76F42
#A76F42
oklch(59.1% 0.094 58.4)
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 #4285AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.014
- Cool Blue #4984B8 ΔE 0.017
- Off Blue #5684AE ΔE 0.019
- Dusty Blue #5A86AD ΔE 0.024
- Blue NCS #118AB2 ΔE 0.026
- Cerulean #457B9D ΔE 0.035
- Stormy Blue #507B9C ΔE 0.035
- Teal Blue #01889F ΔE 0.043
Use #4285AF 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.