#4991BF
Closest named color: Faded Blue (#658CBB). oklch(63% 0.1 239.1), rgb(73, 145, 191).
Aa
Black text reads best on this color (6.08:1).
About this color
#4991BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.100 and its hue 239°. 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 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.08:1 |
| White text | 3.45:1 |
Values
| HEX | #4991BF |
| RGB | rgb(73, 145, 191) |
| HSL | hsl(203, 48%, 52%) |
| OKLCH | oklch(63% 0.1 239.1) |
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 #4991BF | 3.45:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #4991BF | 6.08:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #4991BF text on white | 3.45:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #4991BF text on black | 6.08:1 | AA | Lc -39.9 | 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
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A4C6DD
oklch(80.9% 0.049 237.8)
-
Step 400
400
#72A8CC
oklch(70.7% 0.078 238.5)
-
Step 500
500 (this color)
#4991BF
oklch(63% 0.1 239.1)
-
Step 600
600
#277BAC
oklch(55.6% 0.109 239.2)
-
Step 700
700
#186794
oklch(49% 0.102 239.8)
-
Step 800
800
#185478
oklch(42.6% 0.084 240)
-
Step 900
900
#1B4660
oklch(37.7% 0.065 238.5)
-
Step 950
950
#112938
oklch(26.9% 0.041 238.3)
#4991BF 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) | #7C91C1 | 0.055 |
| Deuteranopia (no green cones) | #6C85BE | 0.046 |
| Tritanopia (no blue cones) | #009DA1 | 0.073 |
| Achromatopsia (no color) | #8A8A8A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4991BF
#4991BF
oklch(63% 0.1 239.1)
- #B67948
#B67948
oklch(62.9% 0.1 58.3)
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 #4991BF, 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 0.036
- Cool Blue #4984B8 ΔE 0.036
- Off Blue #5684AE ΔE 0.039
- Steel Blue #4682B4 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.044
- Water Blue #0E87CC ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.055
Use #4991BF 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.