#5A91CC
Closest named color: Faded Blue (#658CBB). oklch(64.4% 0.107 251.4), rgb(90, 145, 204).
Aa
Black text reads best on this color (6.35:1).
About this color
#5A91CC is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.107 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.027 away. Black text reads best on it, at 6.35:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #5A91CC |
| RGB | rgb(90, 145, 204) |
| HSL | hsl(211, 53%, 58%) |
| OKLCH | oklch(64.4% 0.107 251.4) |
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 #5A91CC | 3.30:1 | AA large text | Lc -65.7 | Content text, not long reading |
| Black text on #5A91CC | 6.35:1 | AA | Lc 43.8 | Non-text elements, placeholder text |
| #5A91CC text on white | 3.30:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #5A91CC text on black | 6.35:1 | AA | Lc -41.5 | 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
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A8C4E2
oklch(81% 0.052 250.3)
-
Step 400
400
#7AA4D3
oklch(70.6% 0.083 251.8)
-
Step 500
500 (this color)
#5A91CC
oklch(64.4% 0.107 251.4)
-
Step 600
600
#3A76B5
oklch(55.6% 0.117 251.7)
-
Step 700
700
#2C639B
oklch(49.1% 0.107 251.3)
-
Step 800
800
#26517E
oklch(42.7% 0.089 251.6)
-
Step 900
900
#244365
oklch(37.6% 0.069 252.1)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#5A91CC 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) | #7994CF | 0.038 |
| Deuteranopia (no green cones) | #6A88CB | 0.028 |
| Tritanopia (no blue cones) | #009FA6 | 0.093 |
| Achromatopsia (no color) | #8D8D8D | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A91CC
#5A91CC
oklch(64.4% 0.107 251.4)
- #B6823D
#B6823D
oklch(64.5% 0.107 71.5)
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 #5A91CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.043
- Cool Blue #4984B8 ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.052
- Off Blue #5684AE ΔE 0.053
- Steel Blue #4682B4 ΔE 0.057
Use #5A91CC 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.