#4088AB
Closest named color: Off Blue (#5684AE). oklch(59.5% 0.089 232.1), rgb(64, 136, 171).
Aa
Black text reads best on this color (5.32:1).
About this color
#4088AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.089 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.024 away. Black text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #4088AB |
| RGB | rgb(64, 136, 171) |
| HSL | hsl(200, 46%, 46%) |
| OKLCH | oklch(59.5% 0.089 232.1) |
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 #4088AB | 3.94:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #4088AB | 5.32:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #4088AB text on white | 3.94:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #4088AB text on black | 5.32:1 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A5C6D8
oklch(80.8% 0.044 231.9)
-
Step 400
400
#73A9C5
oklch(70.7% 0.07 231.6)
-
Step 500
500 (this color)
#4088AB
oklch(59.5% 0.089 232.1)
-
Step 600
600
#297DA2
oklch(55.7% 0.097 231.5)
-
Step 700
700
#1A698B
oklch(49.1% 0.09 232)
-
Step 800
800
#195671
oklch(42.8% 0.075 231.7)
-
Step 900
900
#1C475B
oklch(37.7% 0.058 231.3)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#4088AB 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 | 0.060 |
| Deuteranopia (no green cones) | #687BAA | 0.052 |
| Tritanopia (no blue cones) | #009194 | 0.058 |
| Achromatopsia (no color) | #808080 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4088AB
#4088AB
oklch(59.5% 0.089 232.1)
- #A96F4B
#A96F4B
oklch(59.5% 0.089 52.1)
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 #4088AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.024
- Blue NCS #118AB2 ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.025
- Steel Blue #4682B4 ΔE 0.026
- Cool Blue #4984B8 ΔE 0.027
- Teal Blue #01889F ΔE 0.036
- Cerulean #457B9D ΔE 0.038
- Stormy Blue #507B9C ΔE 0.039
Use #4088AB 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.