#3B4D91
Closest named color: Dusk Blue (#26538D). oklch(44.1% 0.114 270.1), rgb(59, 77, 145).
Aa
White text reads best on this color (7.90:1).
About this color
#3B4D91 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.114 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.028 away. White text reads best on it, at 7.90:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #3B4D91 |
| RGB | rgb(59, 77, 145) |
| HSL | hsl(227, 42%, 40%) |
| OKLCH | oklch(44.1% 0.114 270.1) |
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 #3B4D91 | 7.90:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #3B4D91 | 2.65:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #3B4D91 text on white | 7.90:1 | AAA | Lc 87.2 | Fine for body text |
| #3B4D91 text on black | 2.65:1 | Fails | Lc -14.9 | Not readable |
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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#B0BFEC
oklch(80.9% 0.066 270.5)
-
Step 400
400
#879DE3
oklch(70.7% 0.106 270.2)
-
Step 500
500
#6A83DB
oklch(63.1% 0.136 270.2)
-
Step 600
600
#536BC9
oklch(55.6% 0.148 270.2)
-
Step 700
700
#4359AE
oklch(49.2% 0.137 269.8)
-
Step 800
800 (this color)
#3B4D91
oklch(44.1% 0.114 270.1)
-
Step 900
900
#303E70
oklch(37.8% 0.087 270)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#3B4D91 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) | #2D5594 | 0.025 |
| Deuteranopia (no green cones) | #214E90 | 0.027 |
| Tritanopia (no blue cones) | #005C68 | 0.100 |
| Achromatopsia (no color) | #515151 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4D91
#3B4D91
oklch(44.1% 0.114 270.1)
- #665000
#665000
oklch(44.1% 0.09 90.4)
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 #3B4D91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.028
- Twilight #4E518B ΔE 0.032
- Blueberry #464196 ΔE 0.035
- Cobalt #1E488F ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.040
- Light Navy #155084 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.044
Use #3B4D91 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.