#4285A3
Closest named color: Off Blue (#5684AE). oklch(58.5% 0.082 229.6), rgb(66, 133, 163).
Aa
Black text reads best on this color (5.11:1).
About this color
#4285A3 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.082 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.028 away. Black text reads best on it, at 5.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #4285A3 |
| RGB | rgb(66, 133, 163) |
| HSL | hsl(199, 42%, 45%) |
| OKLCH | oklch(58.5% 0.082 229.6) |
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 #4285A3 | 4.10:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #4285A3 | 5.11:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #4285A3 text on white | 4.10:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #4285A3 text on black | 5.11:1 | AA | Lc -33.6 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D4
oklch(81% 0.037 228.5)
-
Step 400
400
#7AA8BE
oklch(70.7% 0.059 229.1)
-
Step 500
500
#5692AE
oklch(63% 0.075 229.7)
-
Step 600
600 (this color)
#4285A3
oklch(58.5% 0.082 229.6)
-
Step 700
700
#2A6983
oklch(49.2% 0.076 228.5)
-
Step 800
800
#25556B
oklch(42.6% 0.063 230.6)
-
Step 900
900
#234757
oklch(37.8% 0.05 229)
-
Step 950
950
#152933
oklch(26.9% 0.032 231.4)
#4285A3 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) | #7683A5 | 0.059 |
| Deuteranopia (no green cones) | #6879A3 | 0.051 |
| Tritanopia (no blue cones) | #008D8F | 0.054 |
| Achromatopsia (no color) | #7D7D7D | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4285A3
#4285A3
oklch(58.5% 0.082 229.6)
- #A36D4F
#A36D4F
oklch(58.5% 0.082 49.6)
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 #4285A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.028
- Cerulean #457B9D ΔE 0.028
- Stormy Blue #507B9C ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Steel Blue #4682B4 ΔE 0.031
- Blue NCS #118AB2 ΔE 0.031
- Teal Blue #01889F ΔE 0.031
- Cool Blue #4984B8 ΔE 0.035
Use #4285A3 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.