#4591B7
Closest named color: Dusty Blue (#5A86AD). oklch(62.4% 0.094 232.8), rgb(69, 145, 183).
Aa
Black text reads best on this color (5.98:1).
About this color
#4591B7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.094 and its hue 233°. 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 5.98:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #4591B7 |
| RGB | rgb(69, 145, 183) |
| HSL | hsl(200, 45%, 49%) |
| OKLCH | oklch(62.4% 0.094 232.8) |
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 #4591B7 | 3.50:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #4591B7 | 5.98:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #4591B7 text on white | 3.50:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #4591B7 text on black | 5.98:1 | AA | Lc -39.3 | 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
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A4C6DA
oklch(80.8% 0.046 233.9)
-
Step 400
400
#71A9C7
oklch(70.7% 0.073 232.6)
-
Step 500
500 (this color)
#4591B7
oklch(62.4% 0.094 232.8)
-
Step 600
600
#227DA5
oklch(55.6% 0.102 232.4)
-
Step 700
700
#12698E
oklch(49.1% 0.096 233.1)
-
Step 800
800
#145673
oklch(42.8% 0.079 232.5)
-
Step 900
900
#1A475D
oklch(37.7% 0.061 233)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#4591B7 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) | #7E8FB9 | 0.061 |
| Deuteranopia (no green cones) | #6F84B6 | 0.053 |
| Tritanopia (no blue cones) | #009B9E | 0.062 |
| Achromatopsia (no color) | #898989 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4591B7
#4591B7
oklch(62.4% 0.094 232.8)
- #B47750
#B47750
oklch(62.4% 0.094 52.8)
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 #4591B7, 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 0.034
- Off Blue #5684AE ΔE 0.037
- Blue NCS #118AB2 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.053
- Blue Grey #758DA3 ΔE 0.054
Use #4591B7 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.