#2F406E
Closest named color: Twilight Blue (#0A437A). oklch(38.1% 0.082 267.2), rgb(47, 64, 110).
Aa
White text reads best on this color (10.09:1).
About this color
#2F406E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.082 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.036 away. White text reads best on it, at 10.09:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.07:1 |
| White text | 10.09:1 |
Values
| HEX | #2F406E |
| RGB | rgb(47, 64, 110) |
| HSL | hsl(224, 40%, 31%) |
| OKLCH | oklch(38.1% 0.082 267.2) |
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 #2F406E | 10.09:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #2F406E | 2.07:1 | Fails | Lc 10.6 | Not readable |
| #2F406E text on white | 10.09:1 | AAA | Lc 93.3 | Preferred for body text |
| #2F406E text on black | 2.07:1 | Fails | Lc -9.2 | 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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AFC0E9
oklch(80.9% 0.061 267.4)
-
Step 400
400
#859FDE
oklch(70.7% 0.097 266.7)
-
Step 500
500
#6786D5
oklch(63.2% 0.125 266.7)
-
Step 600
600
#506EC3
oklch(55.7% 0.136 267.3)
-
Step 700
700
#405BA8
oklch(49% 0.127 267.1)
-
Step 800
800
#354B88
oklch(42.7% 0.105 267)
-
Step 900
900 (this color)
#2F406E
oklch(38.1% 0.082 267.2)
-
Step 950
950
#1B2540
oklch(27% 0.052 267.5)
#2F406E 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) | #2D4570 | 0.015 |
| Deuteranopia (no green cones) | #263F6D | 0.012 |
| Tritanopia (no blue cones) | #0D4A51 | 0.074 |
| Achromatopsia (no color) | #424242 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F406E
#2F406E
oklch(38.1% 0.082 267.2)
- #543F00
#543F00
oklch(38% 0.078 87.2)
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 #2F406E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.043
- Marine Blue #01386A ΔE 0.051
- Light Navy #155084 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.056
- Charcoal #264653 ΔE 0.057
- Cobalt #1E488F ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.063
Use #2F406E 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.