#4F5CB9
Closest named color: Iris (#6258C4). oklch(51.3% 0.146 274.1), rgb(79, 92, 185).
Aa
White text reads best on this color (5.89:1).
About this color
#4F5CB9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.146 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.033 away. White text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #4F5CB9 |
| RGB | rgb(79, 92, 185) |
| HSL | hsl(233, 43%, 52%) |
| OKLCH | oklch(51.3% 0.146 274.1) |
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 #4F5CB9 | 5.89:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #4F5CB9 | 3.56:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #4F5CB9 text on white | 5.89:1 | AA | Lc 79.2 | Fine for body text |
| #4F5CB9 text on black | 3.56:1 | AA large text | Lc -22.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F4
oklch(88.6% 0.039 274.4)
-
Step 300
300
#B2BEEF
oklch(80.9% 0.071 274)
-
Step 400
400
#8B9BE7
oklch(70.7% 0.113 274.1)
-
Step 500
500
#7080E0
oklch(63.1% 0.145 274.4)
-
Step 600
600
#5967CD
oklch(55.5% 0.157 274.3)
-
Step 700
700 (this color)
#4F5CB9
oklch(51.3% 0.146 274.1)
-
Step 800
800
#3C4690
oklch(42.6% 0.121 274.3)
-
Step 900
900
#333C73
oklch(37.8% 0.094 274)
-
Step 950
950
#1E2343
oklch(26.9% 0.06 275)
#4F5CB9 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) | #2C69BC | 0.045 |
| Deuteranopia (no green cones) | #1A60B7 | 0.049 |
| Tritanopia (no blue cones) | #0B7182 | 0.128 |
| Achromatopsia (no color) | #646464 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F5CB9
#4F5CB9
oklch(51.3% 0.146 274.1)
- #7B6500
#7B6500
oklch(51.3% 0.105 93.9)
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 #4F5CB9, closest first.
No curated palette has a color within ΔE 0.04 of #4F5CB9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.033
- French Blue #436BAD ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.056
- Dusky Blue #475F94 ΔE 0.063
Use #4F5CB9 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.