#4F88BE
Closest named color: Cool Blue (#4984B8). oklch(61.1% 0.102 248.6), rgb(79, 136, 190).
Aa
Black text reads best on this color (5.59:1).
About this color
#4F88BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.102 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.015 away. Black text reads best on it, at 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.59:1 |
| White text | 3.75:1 |
Values
| HEX | #4F88BE |
| RGB | rgb(79, 136, 190) |
| HSL | hsl(209, 46%, 53%) |
| OKLCH | oklch(61.1% 0.102 248.6) |
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 #4F88BE | 3.75:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #4F88BE | 5.59:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #4F88BE text on white | 3.75:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #4F88BE text on black | 5.59:1 | AA | Lc -36.8 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A8C4E0
oklch(80.9% 0.05 248.4)
-
Step 400
400
#79A5D1
oklch(70.7% 0.08 249)
-
Step 500
500 (this color)
#4F88BE
oklch(61.1% 0.102 248.6)
-
Step 600
600
#3877B1
oklch(55.5% 0.111 248.8)
-
Step 700
700
#2A6498
oklch(49% 0.103 248.6)
-
Step 800
800
#24527B
oklch(42.7% 0.085 248.1)
-
Step 900
900
#234463
oklch(37.7% 0.066 248.6)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#4F88BE 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) | #718AC0 | 0.040 |
| Deuteranopia (no green cones) | #627FBD | 0.030 |
| Tritanopia (no blue cones) | #00959B | 0.085 |
| Achromatopsia (no color) | #848484 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F88BE
#4F88BE
oklch(61.1% 0.102 248.6)
- #AB7739
#AB7739
oklch(61% 0.102 68.5)
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 #4F88BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.015
- Steel Blue #4682B4 ΔE 0.024
- Off Blue #5684AE ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.027
- Faded Blue #658CBB ΔE 0.028
- Water Blue #0E87CC ΔE 0.042
- Blue NCS #118AB2 ΔE 0.044
- Windows Blue #3778BF ΔE 0.054
Use #4F88BE 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.