#3F59AF
Closest named color: Mid Blue (#276AB3). oklch(49% 0.14 268.2), rgb(63, 89, 175).
Aa
White text reads best on this color (6.44:1).
About this color
#3F59AF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.140 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.047 away. White text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #3F59AF |
| RGB | rgb(63, 89, 175) |
| HSL | hsl(226, 47%, 47%) |
| OKLCH | oklch(49% 0.14 268.2) |
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 #3F59AF | 6.44:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #3F59AF | 3.25:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #3F59AF text on white | 6.44:1 | AA | Lc 81.7 | Fine for body text |
| #3F59AF text on black | 3.25:1 | AA large text | Lc -20.2 | 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
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#AEC0ED
oklch(81% 0.067 267.8)
-
Step 400
400
#849EE5
oklch(70.8% 0.108 268.2)
-
Step 500
500
#6684DD
oklch(63.1% 0.138 268.2)
-
Step 600
600
#4E6CCB
oklch(55.7% 0.151 268.1)
-
Step 700
700 (this color)
#3F59AF
oklch(49% 0.14 268.2)
-
Step 800
800
#34498E
oklch(42.6% 0.117 268.4)
-
Step 900
900
#2D3E71
oklch(37.7% 0.09 268)
-
Step 950
950
#1B2542
oklch(27.1% 0.056 268.2)
#3F59AF 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) | #2C64B2 | 0.032 |
| Deuteranopia (no green cones) | #135AAD | 0.036 |
| Tritanopia (no blue cones) | #006D7B | 0.119 |
| Achromatopsia (no color) | #5E5E5E | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F59AF
#3F59AF
oklch(49% 0.14 268.2)
- #785C00
#785C00
oklch(49% 0.1 87.9)
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 #3F59AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.050
- French Blue #436BAD ΔE 0.051
- Iris #6258C4 ΔE 0.059
- Twilight #4E518B ΔE 0.060
- Dusk Blue #26538D ΔE 0.064
- Light Navy Blue #2E5A88 ΔE 0.068
Use #3F59AF 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.