#4591BD
Closest named color: Faded Blue (#658CBB). oklch(62.7% 0.1 236.8), rgb(69, 145, 189).
Aa
Black text reads best on this color (6.03:1).
About this color
#4591BD is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.100 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.032 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.03:1 |
| White text | 3.47:1 |
Values
| HEX | #4591BD |
| RGB | rgb(69, 145, 189) |
| HSL | hsl(202, 48%, 51%) |
| OKLCH | oklch(62.7% 0.1 236.8) |
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 #4591BD | 3.47:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #4591BD | 6.03:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #4591BD text on white | 3.47:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #4591BD text on black | 6.03:1 | AA | Lc -39.6 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A3C6DD
oklch(80.9% 0.05 237)
-
Step 400
400
#70A8CC
oklch(70.6% 0.079 237.6)
-
Step 500
500 (this color)
#4591BD
oklch(62.7% 0.1 236.8)
-
Step 600
600
#217CAB
oklch(55.7% 0.109 236.8)
-
Step 700
700
#116892
oklch(49% 0.101 236.7)
-
Step 800
800
#145577
oklch(42.7% 0.084 237.1)
-
Step 900
900
#194660
oklch(37.6% 0.066 237.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#4591BD 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) | #7C90BF | 0.059 |
| Deuteranopia (no green cones) | #6C84BC | 0.050 |
| Tritanopia (no blue cones) | #009CA0 | 0.069 |
| Achromatopsia (no color) | #898989 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4591BD
#4591BD
oklch(62.7% 0.1 236.8)
- #B67849
#B67849
oklch(62.7% 0.1 56.8)
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 #4591BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
- Off Blue #5684AE ΔE 0.038
- Blue NCS #118AB2 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.042
- Water Blue #0E87CC ΔE 0.051
- Silver Lake Blue #778DA9 ΔE 0.056
Use #4591BD 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.