#5191BB
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.091 239.2), rgb(81, 145, 187).
Aa
Black text reads best on this color (6.11:1).
About this color
#5191BB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.091 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.023 away. Black text reads best on it, at 6.11:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.11:1 |
| White text | 3.43:1 |
Values
| HEX | #5191BB |
| RGB | rgb(81, 145, 187) |
| HSL | hsl(204, 44%, 53%) |
| OKLCH | oklch(63.1% 0.091 239.2) |
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 #5191BB | 3.43:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #5191BB | 6.11:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #5191BB text on white | 3.43:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #5191BB text on black | 6.11:1 | AA | Lc -40.0 | 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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A7C5DB
oklch(80.8% 0.045 239.9)
-
Step 400
400
#77A7C9
oklch(70.7% 0.072 239.9)
-
Step 500
500 (this color)
#5191BB
oklch(63.1% 0.091 239.2)
-
Step 600
600
#327BA7
oklch(55.7% 0.099 238.7)
-
Step 700
700
#24678F
oklch(49.1% 0.092 239.1)
-
Step 800
800
#205474
oklch(42.6% 0.076 239.2)
-
Step 900
900
#20465E
oklch(37.8% 0.06 238.8)
-
Step 950
950
#142937
oklch(27% 0.038 239.4)
#5191BB 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) | #7E91BD | 0.051 |
| Deuteranopia (no green cones) | #7086BA | 0.043 |
| Tritanopia (no blue cones) | #009C9F | 0.073 |
| Achromatopsia (no color) | #8A8A8A | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5191BB
#5191BB
oklch(63.1% 0.091 239.2)
- #B37C4F
#B37C4F
oklch(63.2% 0.092 59.4)
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 #5191BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.033
- Off Blue #5684AE ΔE 0.037
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.048
- Blue Grey #758DA3 ΔE 0.049
Use #5191BB 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.