#2F405E
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.056 261.4), rgb(47, 64, 94).
Aa
White text reads best on this color (10.41:1).
About this color
#2F405E is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.056 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 10.41:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.41:1 |
Values
| HEX | #2F405E |
| RGB | rgb(47, 64, 94) |
| HSL | hsl(218, 33%, 28%) |
| OKLCH | oklch(37.1% 0.056 261.4) |
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 #2F405E | 10.41:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #2F405E | 2.01:1 | Fails | Lc 9.8 | Not readable |
| #2F405E text on white | 10.41:1 | AAA | Lc 94.1 | Preferred for body text |
| #2F405E text on black | 2.01:1 | Fails | Lc -8.4 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B2C1DD
oklch(80.9% 0.043 263)
-
Step 400
400
#89A1CC
oklch(70.6% 0.069 261.9)
-
Step 500
500
#6C8ABE
oklch(63.1% 0.086 261.1)
-
Step 600
600
#5473AA
oklch(55.6% 0.093 261.4)
-
Step 700
700
#446092
oklch(49% 0.087 261.4)
-
Step 800
800
#384F77
oklch(42.8% 0.073 261)
-
Step 900
900 (this color)
#2F405E
oklch(37.1% 0.056 261.4)
-
Step 950
950
#1D2738
oklch(27.2% 0.035 260.8)
#2F405E 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) | #35425F | 0.011 |
| Deuteranopia (no green cones) | #303E5D | 0.006 |
| Tritanopia (no blue cones) | #1C464B | 0.049 |
| Achromatopsia (no color) | #404040 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F405E
#2F405E
oklch(37.1% 0.056 261.4)
- #4F3D1A
#4F3D1A
oklch(37.1% 0.057 82.1)
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 #2F405E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.045
- Onyx #343A40 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.054
- Midnight Green #073B4C ΔE 0.055
Use #2F405E 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.