#4581BE
Closest named color: Cool Blue (#4984B8). oklch(59% 0.113 250.6), rgb(69, 129, 190).
Aa
Black text reads best on this color (5.13:1).
About this color
#4581BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.113 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.015 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.13:1 |
| White text | 4.08:1 |
Values
| HEX | #4581BE |
| RGB | rgb(69, 129, 190) |
| HSL | hsl(210, 48%, 51%) |
| OKLCH | oklch(59% 0.113 250.6) |
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 #4581BE | 4.08:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #4581BE | 5.13:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #4581BE text on white | 4.08:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #4581BE text on black | 5.13:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A9C4E1
oklch(81% 0.051 250.3)
-
Step 400
400
#7AA5D2
oklch(70.8% 0.081 250.1)
-
Step 500
500
#578DC6
oklch(63% 0.104 251)
-
Step 600
600 (this color)
#4581BE
oklch(59% 0.113 250.6)
-
Step 700
700
#2C639A
oklch(49% 0.106 250.9)
-
Step 800
800
#26517D
oklch(42.6% 0.088 251.1)
-
Step 900
900
#244464
oklch(37.8% 0.067 250)
-
Step 950
950
#16283B
oklch(27.1% 0.043 250.9)
#4581BE 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) | #6784C1 | 0.039 |
| Deuteranopia (no green cones) | #5678BD | 0.028 |
| Tritanopia (no blue cones) | #008F97 | 0.089 |
| Achromatopsia (no color) | #7D7D7D | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4581BE
#4581BE
oklch(59% 0.113 250.6)
- #A77023
#A77023
oklch(59% 0.113 70.6)
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 #4581BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.015
- Steel Blue #4682B4 ΔE 0.017
- Windows Blue #3778BF ΔE 0.030
- Off Blue #5684AE ΔE 0.032
- Water Blue #0E87CC ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.039
- Blue NCS #118AB2 ΔE 0.044
- Nice Blue #107AB0 ΔE 0.046
Use #4581BE 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.