#2F4071
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.086 267.8), rgb(47, 64, 113).
Aa
White text reads best on this color (10.03:1).
About this color
#2F4071 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.086 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 10.03:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.09:1 |
| White text | 10.03:1 |
Values
| HEX | #2F4071 |
| RGB | rgb(47, 64, 113) |
| HSL | hsl(225, 41%, 31%) |
| OKLCH | oklch(38.3% 0.086 267.8) |
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 #2F4071 | 10.03:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #2F4071 | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #2F4071 text on white | 10.03:1 | AAA | Lc 93.1 | Preferred for body text |
| #2F4071 text on black | 2.09:1 | Fails | Lc -9.3 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AEC0EC
oklch(80.9% 0.066 267.5)
-
Step 400
400
#849EE2
oklch(70.6% 0.104 267.7)
-
Step 500
500
#6785DA
oklch(63.2% 0.133 267.8)
-
Step 600
600
#4F6DC7
oklch(55.7% 0.144 267.7)
-
Step 700
700
#405AAC
oklch(49.1% 0.134 268)
-
Step 800
800
#354A8B
oklch(42.7% 0.111 268)
-
Step 900
900 (this color)
#2F4071
oklch(38.3% 0.086 267.8)
-
Step 950
950
#1B2541
oklch(27% 0.054 267.8)
#2F4071 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) | #2B4573 | 0.015 |
| Deuteranopia (no green cones) | #233F70 | 0.015 |
| Tritanopia (no blue cones) | #074B53 | 0.078 |
| Achromatopsia (no color) | #424242 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4071
#2F4071
oklch(38.3% 0.086 267.8)
- #554000
#554000
oklch(38.4% 0.078 87.5)
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 #2F4071, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.047
- Marine Blue #01386A ΔE 0.052
- Cobalt #1E488F ΔE 0.053
- Light Navy #155084 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.060
- Charcoal #264653 ΔE 0.062
Use #2F4071 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.