#4F99BF
Closest named color: Faded Blue (#658CBB). oklch(65.1% 0.093 233.1), rgb(79, 153, 191).
Aa
Black text reads best on this color (6.64:1).
About this color
#4F99BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.093 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.039 away. Black text reads best on it, at 6.64:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.64:1 |
| White text | 3.16:1 |
Values
| HEX | #4F99BF |
| RGB | rgb(79, 153, 191) |
| HSL | hsl(200, 47%, 53%) |
| OKLCH | oklch(65.1% 0.093 233.1) |
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 #4F99BF | 3.16:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #4F99BF | 6.64:1 | AA | Lc 45.5 | Large or bold text, headings |
| #4F99BF text on white | 3.16:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #4F99BF text on black | 6.64:1 | AA | Lc -43.2 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A4C6DA
oklch(80.8% 0.046 233.9)
-
Step 400
400
#72A9C7
oklch(70.8% 0.073 233)
-
Step 500
500 (this color)
#4F99BF
oklch(65.1% 0.093 233.1)
-
Step 600
600
#257DA5
oklch(55.7% 0.101 232.9)
-
Step 700
700
#16698D
oklch(49.1% 0.094 232.9)
-
Step 800
800
#165673
oklch(42.8% 0.078 232.9)
-
Step 900
900
#1B475D
oklch(37.8% 0.061 233.4)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#4F99BF 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) | #8797C1 | 0.062 |
| Deuteranopia (no green cones) | #778CBE | 0.052 |
| Tritanopia (no blue cones) | #00A3A6 | 0.065 |
| Achromatopsia (no color) | #919191 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F99BF
#4F99BF
oklch(65.1% 0.093 233.1)
- #BC7F58
#BC7F58
oklch(65% 0.093 53)
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 #4F99BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.039
- Greyblue #77A1B5 ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.053
- Cadet Blue #5F9EA0 ΔE 0.055
- Blue Grey #758DA3 ΔE 0.055
- Off Blue #5684AE ΔE 0.058
- Cool Blue #4984B8 ΔE 0.060
Use #4F99BF 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.