#2F4155
Closest named color: Dark Grey Blue (#29465B). oklch(36.9% 0.042 251.6), rgb(47, 65, 85).
Aa
White text reads best on this color (10.45:1).
About this color
#2F4155 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.042 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.017 away. White text reads best on it, at 10.45:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #2F4155 |
| RGB | rgb(47, 65, 85) |
| HSL | hsl(212, 29%, 26%) |
| OKLCH | oklch(36.9% 0.042 251.6) |
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 #2F4155 | 10.45:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #2F4155 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #2F4155 text on white | 10.45:1 | AAA | Lc 94.2 | Preferred for body text |
| #2F4155 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B2C2D5
oklch(80.8% 0.032 252.7)
-
Step 400
400
#8AA3BF
oklch(70.6% 0.05 251.4)
-
Step 500
500
#6D8CAF
oklch(63% 0.064 251.9)
-
Step 600
600
#55769B
oklch(55.6% 0.069 251.9)
-
Step 700
700
#456385
oklch(49.1% 0.065 252.2)
-
Step 800
800
#39516C
oklch(42.7% 0.054 252)
-
Step 900
900 (this color)
#2F4155
oklch(36.9% 0.042 251.6)
-
Step 950
950
#1D2733
oklch(26.9% 0.027 253.3)
#2F4155 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) | #394256 | 0.015 |
| Deuteranopia (no green cones) | #353E55 | 0.012 |
| Tritanopia (no blue cones) | #214648 | 0.037 |
| Achromatopsia (no color) | #3F3F3F | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4155
#2F4155
oklch(36.9% 0.042 251.6)
- #4D3C26
#4D3C26
oklch(36.9% 0.042 73.1)
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 #2F4155, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.017
- Charcoal #264653 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.037
- Onyx #343A40 ΔE 0.037
- Midnight Green #073B4C ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.051
Use #2F4155 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.