#4283BA
Closest named color: Cool Blue (#4984B8). oklch(59.2% 0.108 246.5), rgb(66, 131, 186).
Aa
Black text reads best on this color (5.18:1).
About this color
#4283BA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.108 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.008 away. Black text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.18:1 |
| White text | 4.04:1 |
Values
| HEX | #4283BA |
| RGB | rgb(66, 131, 186) |
| HSL | hsl(208, 48%, 49%) |
| OKLCH | oklch(59.2% 0.108 246.5) |
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 #4283BA | 4.04:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #4283BA | 5.18:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #4283BA text on white | 4.04:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #4283BA text on black | 5.18:1 | AA | Lc -34.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEA
oklch(88.4% 0.027 246.4)
-
Step 300
300
#A8C4DF
oklch(80.8% 0.049 247.5)
-
Step 400
400
#78A6CF
oklch(70.8% 0.078 246.1)
-
Step 500
500
#548FC2
oklch(63.1% 0.099 246.3)
-
Step 600
600 (this color)
#4283BA
oklch(59.2% 0.108 246.5)
-
Step 700
700
#296596
oklch(49.1% 0.1 246.5)
-
Step 800
800
#23527A
oklch(42.6% 0.084 247.1)
-
Step 900
900
#224462
oklch(37.6% 0.065 247.2)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#4283BA 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) | #6B85BC | 0.045 |
| Deuteranopia (no green cones) | #5A79B9 | 0.034 |
| Tritanopia (no blue cones) | #009096 | 0.083 |
| Achromatopsia (no color) | #7E7E7E | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4283BA
#4283BA
oklch(59.2% 0.108 246.5)
- #A8702E
#A8702E
oklch(59.2% 0.107 67.1)
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 #4283BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.008
- Steel Blue #4682B4 ΔE 0.009
- Off Blue #5684AE ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.033
- Water Blue #0E87CC ΔE 0.035
- Blue NCS #118AB2 ΔE 0.036
- Windows Blue #3778BF ΔE 0.036
- Nice Blue #107AB0 ΔE 0.044
Use #4283BA 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.