#4189AA
Closest named color: Off Blue (#5684AE). oklch(59.8% 0.088 230.5), rgb(65, 137, 170).
Aa
Black text reads best on this color (5.38:1).
About this color
#4189AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.088 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.025 away. Black text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.38:1 |
| White text | 3.90:1 |
Values
| HEX | #4189AA |
| RGB | rgb(65, 137, 170) |
| HSL | hsl(199, 45%, 46%) |
| OKLCH | oklch(59.8% 0.088 230.5) |
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 #4189AA | 3.90:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #4189AA | 5.38:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #4189AA text on white | 3.90:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #4189AA text on black | 5.38:1 | AA | Lc -35.4 | 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
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A5C6D7
oklch(80.8% 0.043 230.3)
-
Step 400
400
#73A9C4
oklch(70.7% 0.069 230.7)
-
Step 500
500 (this color)
#4189AA
oklch(59.8% 0.088 230.5)
-
Step 600
600
#2A7DA0
oklch(55.6% 0.095 230.2)
-
Step 700
700
#1B6989
oklch(49% 0.088 230.6)
-
Step 800
800
#1A566F
oklch(42.7% 0.073 230)
-
Step 900
900
#1D475A
oklch(37.7% 0.057 230.4)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#4189AA 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) | #7887AC | 0.060 |
| Deuteranopia (no green cones) | #6A7CAA | 0.054 |
| Tritanopia (no blue cones) | #009294 | 0.057 |
| Achromatopsia (no color) | #818181 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4189AA
#4189AA
oklch(59.8% 0.088 230.5)
- #AA704E
#AA704E
oklch(59.9% 0.088 50.8)
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 #4189AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.025
- Blue NCS #118AB2 ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.026
- Steel Blue #4682B4 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.030
- Teal Blue #01889F ΔE 0.036
- Cerulean #457B9D ΔE 0.041
- Stormy Blue #507B9C ΔE 0.041
Use #4189AA 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.