#4580B8
Closest named color: Steel Blue (#4682B4). oklch(58.5% 0.106 249), rgb(69, 128, 184).
Aa
Black text reads best on this color (5.03:1).
About this color
#4580B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.106 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.010 away. Black text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.03:1 |
| White text | 4.17:1 |
Values
| HEX | #4580B8 |
| RGB | rgb(69, 128, 184) |
| HSL | hsl(209, 45%, 50%) |
| OKLCH | oklch(58.5% 0.106 249) |
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 #4580B8 | 4.17:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #4580B8 | 5.03:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #4580B8 text on white | 4.17:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #4580B8 text on black | 5.03:1 | AA | Lc -33.1 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#A9C4DF
oklch(80.9% 0.048 248.4)
-
Step 400
400
#7BA5CF
oklch(70.7% 0.077 249)
-
Step 500
500
#588EC2
oklch(63.1% 0.098 248.7)
-
Step 600
600 (this color)
#4580B8
oklch(58.5% 0.106 249)
-
Step 700
700
#2E6496
oklch(49.1% 0.099 249)
-
Step 800
800
#27527A
oklch(42.8% 0.082 248.8)
-
Step 900
900
#254462
oklch(37.7% 0.064 249.1)
-
Step 950
950
#162839
oklch(27% 0.04 248.2)
#4580B8 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) | #6882BA | 0.040 |
| Deuteranopia (no green cones) | #5877B7 | 0.029 |
| Tritanopia (no blue cones) | #008D94 | 0.084 |
| Achromatopsia (no color) | #7C7C7C | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4580B8
#4580B8
oklch(58.5% 0.106 249)
- #A46F2B
#A46F2B
oklch(58.5% 0.106 69.3)
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 #4580B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.010
- Cool Blue #4984B8 ΔE 0.013
- Off Blue #5684AE ΔE 0.028
- Windows Blue #3778BF ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.035
- Water Blue #0E87CC ΔE 0.039
- Blue NCS #118AB2 ΔE 0.041
- Nice Blue #107AB0 ΔE 0.041
Use #4580B8 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.