#3F58AB
Closest named color: Denim Blue (#3B5B92). oklch(48.5% 0.136 268.4), rgb(63, 88, 171).
Aa
White text reads best on this color (6.57:1).
About this color
#3F58AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.136 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.043 away. White text reads best on it, at 6.57:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.19:1 |
| White text | 6.57:1 |
Values
| HEX | #3F58AB |
| RGB | rgb(63, 88, 171) |
| HSL | hsl(226, 46%, 46%) |
| OKLCH | oklch(48.5% 0.136 268.4) |
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 #3F58AB | 6.57:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #3F58AB | 3.19:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #3F58AB text on white | 6.57:1 | AA | Lc 82.3 | Fine for body text |
| #3F58AB text on black | 3.19:1 | AA large text | Lc -19.6 | 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
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AFC0EC
oklch(81% 0.065 268.4)
-
Step 400
400
#859EE3
oklch(70.8% 0.105 268.4)
-
Step 500
500
#6784DA
oklch(63% 0.134 268.3)
-
Step 600
600
#506CC8
oklch(55.6% 0.146 268.6)
-
Step 700
700 (this color)
#3F58AB
oklch(48.5% 0.136 268.4)
-
Step 800
800
#354A8C
oklch(42.7% 0.112 268.1)
-
Step 900
900
#2E3E70
oklch(37.7% 0.088 268.6)
-
Step 950
950
#1B2541
oklch(27% 0.054 267.8)
#3F58AB 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) | #2E62AE | 0.029 |
| Deuteranopia (no green cones) | #1859A9 | 0.034 |
| Tritanopia (no blue cones) | #006B79 | 0.116 |
| Achromatopsia (no color) | #5D5D5D | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F58AB
#3F58AB
oklch(48.5% 0.136 268.4)
- #765B00
#765B00
oklch(48.5% 0.099 88.5)
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 #3F58AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.043
- Dusky Blue #475F94 ΔE 0.046
- Mid Blue #276AB3 ΔE 0.050
- French Blue #436BAD ΔE 0.053
- Twilight #4E518B ΔE 0.054
- Dusk Blue #26538D ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.062
- Iris #6258C4 ΔE 0.063
Use #3F58AB 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.