#4580B7
Closest named color: Steel Blue (#4682B4). oklch(58.4% 0.105 248.5), rgb(69, 128, 183).
Aa
Black text reads best on this color (5.02:1).
About this color
#4580B7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.105 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.008 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #4580B7 |
| RGB | rgb(69, 128, 183) |
| HSL | hsl(209, 45%, 49%) |
| OKLCH | oklch(58.4% 0.105 248.5) |
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 #4580B7 | 4.17:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #4580B7 | 5.02:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #4580B7 text on white | 4.17:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #4580B7 text on black | 5.02:1 | 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
#A9C4DE
oklch(80.9% 0.047 247.4)
-
Step 400
400
#7BA5CE
oklch(70.7% 0.076 248.3)
-
Step 500
500
#588EC1
oklch(63% 0.096 248.3)
-
Step 600
600 (this color)
#4580B7
oklch(58.4% 0.105 248.5)
-
Step 700
700
#2E6495
oklch(49% 0.098 248.5)
-
Step 800
800
#275279
oklch(42.7% 0.081 248.2)
-
Step 900
900
#254462
oklch(37.7% 0.064 249.1)
-
Step 950
950
#162839
oklch(27% 0.04 248.2)
#4580B7 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) | #6882B9 | 0.040 |
| Deuteranopia (no green cones) | #5977B6 | 0.030 |
| Tritanopia (no blue cones) | #008D93 | 0.084 |
| Achromatopsia (no color) | #7C7C7C | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4580B7
#4580B7
oklch(58.4% 0.105 248.5)
- #A46F2D
#A46F2D
oklch(58.5% 0.105 68.7)
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 #4580B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.008
- Cool Blue #4984B8 ΔE 0.013
- Off Blue #5684AE ΔE 0.027
- Windows Blue #3778BF ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.034
- Water Blue #0E87CC ΔE 0.040
- Blue NCS #118AB2 ΔE 0.040
- Cerulean #457B9D ΔE 0.040
Use #4580B7 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.