#4284BD
Closest named color: Cool Blue (#4984B8). oklch(59.6% 0.111 247), rgb(66, 132, 189).
Aa
Black text reads best on this color (5.26:1).
About this color
#4284BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.111 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.009 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #4284BD |
| RGB | rgb(66, 132, 189) |
| HSL | hsl(208, 48%, 50%) |
| OKLCH | oklch(59.6% 0.111 247) |
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 #4284BD | 3.98:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #4284BD | 5.26:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #4284BD text on white | 3.98:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #4284BD text on black | 5.26:1 | AA | Lc -34.7 | 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 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E2
oklch(81% 0.054 245.9)
-
Step 400
400
#74A6D4
oklch(70.8% 0.086 247.1)
-
Step 500
500 (this color)
#4284BD
oklch(59.6% 0.111 247)
-
Step 600
600
#2D78B5
oklch(55.6% 0.12 246.9)
-
Step 700
700
#1F659C
oklch(49.2% 0.111 246.8)
-
Step 800
800
#1C527F
oklch(42.6% 0.094 247.5)
-
Step 900
900
#1E4466
oklch(37.6% 0.073 248)
-
Step 950
950
#12283C
oklch(26.9% 0.047 247.8)
#4284BD 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) | #6B86BF | 0.045 |
| Deuteranopia (no green cones) | #5A7ABC | 0.034 |
| Tritanopia (no blue cones) | #009298 | 0.085 |
| Achromatopsia (no color) | #7F7F7F | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4284BD
#4284BD
oklch(59.6% 0.111 247)
- #AA712C
#AA712C
oklch(59.6% 0.11 67.6)
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 #4284BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.009
- Steel Blue #4682B4 ΔE 0.014
- Off Blue #5684AE ΔE 0.029
- Water Blue #0E87CC ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.035
- Blue NCS #118AB2 ΔE 0.037
- Windows Blue #3778BF ΔE 0.038
- Faded Blue #658CBB ΔE 0.045
Use #4284BD 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.