#2F4179
Closest named color: Twilight Blue (#0A437A). oklch(39% 0.098 268.2), rgb(47, 65, 121).
Aa
White text reads best on this color (9.75:1).
About this color
#2F4179 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.098 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 9.75:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.15:1 |
| White text | 9.75:1 |
Values
| HEX | #2F4179 |
| RGB | rgb(47, 65, 121) |
| HSL | hsl(225, 44%, 33%) |
| OKLCH | oklch(39% 0.098 268.2) |
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 #2F4179 | 9.75:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #2F4179 | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #2F4179 text on white | 9.75:1 | AAA | Lc 92.4 | Preferred for body text |
| #2F4179 text on black | 2.15:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ACC0F1
oklch(81% 0.073 267.4)
-
Step 400
400
#829DEA
oklch(70.7% 0.117 268.6)
-
Step 500
500
#6383E3
oklch(63.1% 0.149 268.1)
-
Step 600
600
#4B6AD1
oklch(55.5% 0.162 268.2)
-
Step 700
700
#3D58B5
oklch(49.1% 0.151 268.2)
-
Step 800
800
#324893
oklch(42.6% 0.126 268.3)
-
Step 900
900 (this color)
#2F4179
oklch(39% 0.098 268.2)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#2F4179 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) | #28477B | 0.018 |
| Deuteranopia (no green cones) | #1D4178 | 0.020 |
| Tritanopia (no blue cones) | #004E57 | 0.087 |
| Achromatopsia (no color) | #444444 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4179
#2F4179
oklch(39% 0.098 268.2)
- #574200
#574200
oklch(39.1% 0.08 88)
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 #2F4179, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Cobalt #1E488F ΔE 0.041
- Light Navy #155084 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.050
- Dusk Blue #26538D ΔE 0.056
- Marine Blue #01386A ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.058
Use #2F4179 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.