#4288AB
Closest named color: Off Blue (#5684AE). oklch(59.6% 0.088 232.7), rgb(66, 136, 171).
Aa
Black text reads best on this color (5.34:1).
About this color
#4288AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.088 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.022 away. Black text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.34:1 |
| White text | 3.93:1 |
Values
| HEX | #4288AB |
| RGB | rgb(66, 136, 171) |
| HSL | hsl(200, 44%, 46%) |
| OKLCH | oklch(59.6% 0.088 232.7) |
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 #4288AB | 3.93:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #4288AB | 5.34:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #4288AB text on white | 3.93:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #4288AB text on black | 5.34:1 | AA | Lc -35.1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A6C6D8
oklch(80.9% 0.043 232.7)
-
Step 400
400
#74A9C5
oklch(70.8% 0.069 232.1)
-
Step 500
500 (this color)
#4288AB
oklch(59.6% 0.088 232.7)
-
Step 600
600
#2C7CA2
oklch(55.5% 0.096 233.1)
-
Step 700
700
#1D698B
oklch(49.2% 0.089 232.6)
-
Step 800
800
#1B5671
oklch(42.8% 0.074 232.3)
-
Step 900
900
#1E475B
oklch(37.8% 0.057 232.2)
-
Step 950
950
#122935
oklch(26.8% 0.037 233.2)
#4288AB 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) | #7786AD | 0.059 |
| Deuteranopia (no green cones) | #687CAA | 0.049 |
| Tritanopia (no blue cones) | #009194 | 0.059 |
| Achromatopsia (no color) | #808080 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4288AB
#4288AB
oklch(59.6% 0.088 232.7)
- #A9704C
#A9704C
oklch(59.7% 0.088 52.6)
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 #4288AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.022
- Dusty Blue #5A86AD ΔE 0.024
- Steel Blue #4682B4 ΔE 0.025
- Blue NCS #118AB2 ΔE 0.025
- Cool Blue #4984B8 ΔE 0.027
- Teal Blue #01889F ΔE 0.037
- Cerulean #457B9D ΔE 0.039
- Stormy Blue #507B9C ΔE 0.039
Use #4288AB 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.