#4E91B7
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.089 235.5), rgb(78, 145, 183).
Aa
Black text reads best on this color (6.05:1).
About this color
#4E91B7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.089 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.028 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.05:1 |
| White text | 3.46:1 |
Values
| HEX | #4E91B7 |
| RGB | rgb(78, 145, 183) |
| HSL | hsl(202, 42%, 51%) |
| OKLCH | oklch(62.8% 0.089 235.5) |
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 #4E91B7 | 3.46:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #4E91B7 | 6.05:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #4E91B7 text on white | 3.46:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #4E91B7 text on black | 6.05:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A6C6D9
oklch(80.9% 0.044 234.1)
-
Step 400
400
#75A8C6
oklch(70.7% 0.07 234.9)
-
Step 500
500 (this color)
#4E91B7
oklch(62.8% 0.089 235.5)
-
Step 600
600
#2F7CA4
oklch(55.7% 0.097 235.1)
-
Step 700
700
#21688D
oklch(49.1% 0.09 236)
-
Step 800
800
#1E5572
oklch(42.7% 0.074 235.5)
-
Step 900
900
#1F465C
oklch(37.6% 0.058 235.9)
-
Step 950
950
#132936
oklch(26.9% 0.037 236.3)
#4E91B7 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) | #7F90B9 | 0.055 |
| Deuteranopia (no green cones) | #7185B6 | 0.047 |
| Tritanopia (no blue cones) | #009B9E | 0.066 |
| Achromatopsia (no color) | #8A8A8A | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E91B7
#4E91B7
oklch(62.8% 0.089 235.5)
- #B27A52
#B27A52
oklch(62.8% 0.089 55.8)
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 #4E91B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.031
- Off Blue #5684AE ΔE 0.036
- Cool Blue #4984B8 ΔE 0.039
- Blue NCS #118AB2 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.048
Use #4E91B7 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.