#4F87CC
Closest named color: Cool Blue (#4984B8). oklch(61.6% 0.121 254.6), rgb(79, 135, 204).
Aa
Black text reads best on this color (5.66:1).
About this color
#4F87CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.121 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.032 away. Black text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #4F87CC |
| RGB | rgb(79, 135, 204) |
| HSL | hsl(213, 55%, 55%) |
| OKLCH | oklch(61.6% 0.121 254.6) |
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 #4F87CC | 3.70:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #4F87CC | 5.66:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #4F87CC text on white | 3.70:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #4F87CC text on black | 5.66:1 | AA | Lc -37.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#77A3DB
oklch(70.6% 0.095 254.8)
-
Step 500
500 (this color)
#4F87CC
oklch(61.6% 0.121 254.6)
-
Step 600
600
#3774BE
oklch(55.5% 0.132 254.8)
-
Step 700
700
#2961A4
oklch(49% 0.123 254.8)
-
Step 800
800
#235085
oklch(42.8% 0.101 254.3)
-
Step 900
900
#22436A
oklch(37.8% 0.078 253.9)
-
Step 950
950
#14273E
oklch(26.9% 0.05 254.1)
#4F87CC 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) | #6A8BCF | 0.033 |
| Deuteranopia (no green cones) | #597FCB | 0.022 |
| Tritanopia (no blue cones) | #0097A0 | 0.101 |
| Achromatopsia (no color) | #858585 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F87CC
#4F87CC
oklch(61.6% 0.121 254.6)
- #AF791D
#AF791D
oklch(61.7% 0.121 74.9)
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 #4F87CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.037
- Water Blue #0E87CC ΔE 0.038
- Steel Blue #4682B4 ΔE 0.039
- Faded Blue #658CBB ΔE 0.040
- Off Blue #5684AE ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.048
- Windows Blue #3778BF ΔE 0.052
Use #4F87CC 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.