#4F91CB
Closest named color: Faded Blue (#658CBB). oklch(63.8% 0.111 247.1), rgb(79, 145, 203).
Aa
Black text reads best on this color (6.24:1).
About this color
#4F91CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.111 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.030 away. Black text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.24:1 |
| White text | 3.36:1 |
Values
| HEX | #4F91CB |
| RGB | rgb(79, 145, 203) |
| HSL | hsl(208, 54%, 55%) |
| OKLCH | oklch(63.8% 0.111 247.1) |
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 #4F91CB | 3.36:1 | AA large text | Lc -66.3 | Content text, not long reading |
| Black text on #4F91CB | 6.24:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #4F91CB text on white | 3.36:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #4F91CB text on black | 6.24:1 | AA | Lc -40.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E2
oklch(81% 0.054 245.9)
-
Step 400
400
#74A6D4
oklch(70.8% 0.086 247.1)
-
Step 500
500 (this color)
#4F91CB
oklch(63.8% 0.111 247.1)
-
Step 600
600
#2D78B5
oklch(55.6% 0.12 246.9)
-
Step 700
700
#1F659C
oklch(49.2% 0.111 246.8)
-
Step 800
800
#1C527F
oklch(42.6% 0.094 247.5)
-
Step 900
900
#1E4466
oklch(37.6% 0.073 248)
-
Step 950
950
#12283C
oklch(26.9% 0.047 247.8)
#4F91CB 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) | #7893CE | 0.046 |
| Deuteranopia (no green cones) | #6787CA | 0.034 |
| Tritanopia (no blue cones) | #009FA5 | 0.088 |
| Achromatopsia (no color) | #8C8C8C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F91CB
#4F91CB
oklch(63.8% 0.111 247.1)
- #B87D3A
#B87D3A
oklch(63.7% 0.111 66.8)
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 #4F91CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.048
- Off Blue #5684AE ΔE 0.050
- Water Blue #0E87CC ΔE 0.050
- Steel Blue #4682B4 ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.053
Use #4F91CB 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.