#4285B3
Closest named color: Steel Blue (#4682B4). oklch(59.3% 0.098 241.1), rgb(66, 133, 179).
Aa
Black text reads best on this color (5.23:1).
About this color
#4285B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.098 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.009 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.23:1 |
| White text | 4.00:1 |
Values
| HEX | #4285B3 |
| RGB | rgb(66, 133, 179) |
| HSL | hsl(204, 46%, 48%) |
| OKLCH | oklch(59.3% 0.098 241.1) |
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 #4285B3 | 4.00:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #4285B3 | 5.23:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #4285B3 text on white | 4.00:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #4285B3 text on black | 5.23:1 | AA | Lc -34.5 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A8C5DB
oklch(80.9% 0.044 240.9)
-
Step 400
400
#79A7C9
oklch(70.8% 0.07 241)
-
Step 500
500
#5490BB
oklch(63% 0.09 241.3)
-
Step 600
600 (this color)
#4285B3
oklch(59.3% 0.098 241.1)
-
Step 700
700
#28668F
oklch(49% 0.091 241.2)
-
Step 800
800
#235474
oklch(42.8% 0.075 240.4)
-
Step 900
900
#22455E
oklch(37.6% 0.059 241.7)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#4285B3 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) | #7085B5 | 0.050 |
| Deuteranopia (no green cones) | #617AB2 | 0.041 |
| Tritanopia (no blue cones) | #009095 | 0.071 |
| Achromatopsia (no color) | #7F7F7F | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4285B3
#4285B3
oklch(59.3% 0.098 241.1)
- #A8703D
#A8703D
oklch(59.4% 0.098 61.4)
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 #4285B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.009
- Cool Blue #4984B8 ΔE 0.011
- Off Blue #5684AE ΔE 0.019
- Dusty Blue #5A86AD ΔE 0.025
- Blue NCS #118AB2 ΔE 0.028
- Cerulean #457B9D ΔE 0.039
- Stormy Blue #507B9C ΔE 0.040
- Water Blue #0E87CC ΔE 0.043
Use #4285B3 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.