#4F55A7
Closest named color: Twilight (#4E518B). oklch(48.7% 0.129 277.3), rgb(79, 85, 167).
Aa
White text reads best on this color (6.58:1).
About this color
#4F55A7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.129 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.045 away. White text reads best on it, at 6.58:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.18:1 |
| White text | 6.58:1 |
Values
| HEX | #4F55A7 |
| RGB | rgb(79, 85, 167) |
| HSL | hsl(236, 36%, 48%) |
| OKLCH | oklch(48.7% 0.129 277.3) |
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 #4F55A7 | 6.58:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #4F55A7 | 3.18:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #4F55A7 text on white | 6.58:1 | AA | Lc 82.4 | Fine for body text |
| #4F55A7 text on black | 3.18:1 | AA large text | Lc -19.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D3D8F1
oklch(88.6% 0.035 276.7)
-
Step 300
300
#B6BEEA
oklch(81% 0.063 276.8)
-
Step 400
400
#919BDF
oklch(70.8% 0.1 277.1)
-
Step 500
500
#7780D6
oklch(63% 0.129 277.5)
-
Step 600
600
#6168C3
oklch(55.6% 0.139 277.5)
-
Step 700
700 (this color)
#4F55A7
oklch(48.7% 0.129 277.3)
-
Step 800
800
#424788
oklch(42.7% 0.106 277.6)
-
Step 900
900
#373C6D
oklch(37.7% 0.083 277.2)
-
Step 950
950
#202340
oklch(26.9% 0.054 277.6)
#4F55A7 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) | #2F61AA | 0.044 |
| Deuteranopia (no green cones) | #255AA5 | 0.047 |
| Tritanopia (no blue cones) | #296776 | 0.113 |
| Achromatopsia (no color) | #5D5D5D | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F55A7
#4F55A7
oklch(48.7% 0.129 277.3)
- #6F5F00
#6F5F00
oklch(48.6% 0.1 97.7)
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 #4F55A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.045
- Dusky Blue #475F94 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.048
- Iris #6258C4 ΔE 0.055
- French Blue #436BAD ΔE 0.059
- Blueberry #464196 ΔE 0.059
- Dusk #4E5481 ΔE 0.062
- Mid Blue #276AB3 ΔE 0.064
Use #4F55A7 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.