#4089B0
Closest named color: Off Blue (#5684AE). oklch(60% 0.094 234.7), rgb(64, 137, 176).
Aa
Black text reads best on this color (5.42:1).
About this color
#4089B0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.094 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.023 away. Black text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.42:1 |
| White text | 3.87:1 |
Values
| HEX | #4089B0 |
| RGB | rgb(64, 137, 176) |
| HSL | hsl(201, 47%, 47%) |
| OKLCH | oklch(60% 0.094 234.7) |
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 #4089B0 | 3.87:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #4089B0 | 5.42:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #4089B0 text on white | 3.87:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #4089B0 text on black | 5.42:1 | AA | Lc -35.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A5C6DA
oklch(80.9% 0.045 234.7)
-
Step 400
400
#72A8C8
oklch(70.6% 0.074 235.3)
-
Step 500
500 (this color)
#4089B0
oklch(60% 0.094 234.7)
-
Step 600
600
#277CA6
oklch(55.6% 0.102 234.8)
-
Step 700
700
#18688E
oklch(49% 0.095 235)
-
Step 800
800
#185573
oklch(42.6% 0.078 234.7)
-
Step 900
900
#1C475D
oklch(37.8% 0.06 233.9)
-
Step 950
950
#112937
oklch(26.9% 0.04 236.4)
#4089B0 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) | #7688B2 | 0.058 |
| Deuteranopia (no green cones) | #677CAF | 0.051 |
| Tritanopia (no blue cones) | #009396 | 0.063 |
| Achromatopsia (no color) | #818181 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4089B0
#4089B0
oklch(60% 0.094 234.7)
- #AB7047
#AB7047
oklch(59.9% 0.094 54.7)
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 #4089B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.023
- Cool Blue #4984B8 ΔE 0.023
- Steel Blue #4682B4 ΔE 0.023
- Blue NCS #118AB2 ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.024
- Teal Blue #01889F ΔE 0.041
- Faded Blue #658CBB ΔE 0.043
- Cerulean #457B9D ΔE 0.043
Use #4089B0 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.