#5F91BB
Closest named color: Faded Blue (#658CBB). oklch(63.8% 0.083 245), rgb(95, 145, 187).
Aa
Black text reads best on this color (6.25:1).
About this color
#5F91BB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.083 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.015 away. Black text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.25:1 |
| White text | 3.35:1 |
Values
| HEX | #5F91BB |
| RGB | rgb(95, 145, 187) |
| HSL | hsl(207, 40%, 55%) |
| OKLCH | oklch(63.8% 0.083 245) |
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 #5F91BB | 3.35:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #5F91BB | 6.25:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #5F91BB text on white | 3.35:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #5F91BB text on black | 6.25:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ABC4DA
oklch(80.9% 0.041 244.9)
-
Step 400
400
#7FA5C7
oklch(70.6% 0.065 245.9)
-
Step 500
500 (this color)
#5F91BB
oklch(63.8% 0.083 245)
-
Step 600
600
#4278A5
oklch(55.5% 0.091 245.6)
-
Step 700
700
#33658D
oklch(49% 0.084 244.9)
-
Step 800
800
#2B5373
oklch(42.8% 0.07 244.6)
-
Step 900
900
#28455D
oklch(37.9% 0.054 244.9)
-
Step 950
950
#182836
oklch(27% 0.034 245.9)
#5F91BB 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) | #7F91BD | 0.039 |
| Deuteranopia (no green cones) | #7388BA | 0.032 |
| Tritanopia (no blue cones) | #339B9F | 0.070 |
| Achromatopsia (no color) | #8C8C8C | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F91BB
#5F91BB
oklch(63.8% 0.083 245)
- #AF8154
#AF8154
oklch(63.8% 0.083 64.8)
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 #5F91BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.015
- Dusty Blue #5A86AD ΔE 0.035
- Silver Lake Blue #778DA9 ΔE 0.036
- Blue Grey #758DA3 ΔE 0.040
- Off Blue #5684AE ΔE 0.041
- Cool Blue #4984B8 ΔE 0.046
- Steel Blue #4682B4 ΔE 0.053
- Light Slate Gray #778899 ΔE 0.054
Use #5F91BB 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.