#4591B4
Closest named color: Dusty Blue (#5A86AD). oklch(62.3% 0.092 230.6), rgb(69, 145, 180).
Aa
Black text reads best on this color (5.96:1).
About this color
#4591B4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.092 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.033 away. Black text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.96:1 |
| White text | 3.52:1 |
Values
| HEX | #4591B4 |
| RGB | rgb(69, 145, 180) |
| HSL | hsl(199, 45%, 49%) |
| OKLCH | oklch(62.3% 0.092 230.6) |
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 #4591B4 | 3.52:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #4591B4 | 5.96:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #4591B4 text on white | 3.52:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #4591B4 text on black | 5.96:1 | AA | Lc -39.1 | 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 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
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C7D8
oklch(81% 0.044 228.9)
-
Step 400
400
#71A9C5
oklch(70.6% 0.071 230.8)
-
Step 500
500 (this color)
#4591B4
oklch(62.3% 0.092 230.6)
-
Step 600
600
#237DA3
oklch(55.6% 0.1 231.2)
-
Step 700
700
#136A8B
oklch(49.2% 0.092 230)
-
Step 800
800
#155671
oklch(42.7% 0.077 230.8)
-
Step 900
900
#1A475B
oklch(37.6% 0.059 230.5)
-
Step 950
950
#112A35
oklch(27.1% 0.037 229)
#4591B4 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) | #7F8FB6 | 0.063 |
| Deuteranopia (no green cones) | #7083B4 | 0.056 |
| Tritanopia (no blue cones) | #009B9C | 0.061 |
| Achromatopsia (no color) | #888888 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4591B4
#4591B4
oklch(62.3% 0.092 230.6)
- #B37653
#B37653
oklch(62.2% 0.091 50.3)
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 #4591B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.033
- Faded Blue #658CBB ΔE 0.036
- Off Blue #5684AE ΔE 0.037
- Blue NCS #118AB2 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.044
- Blue Grey #758DA3 ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.052
Use #4591B4 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.