#2F3F5A
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.051 260.6), rgb(47, 63, 90).
Aa
White text reads best on this color (10.60:1).
About this color
#2F3F5A is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.051 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 10.60:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.60:1 |
Values
| HEX | #2F3F5A |
| RGB | rgb(47, 63, 90) |
| HSL | hsl(218, 31%, 27%) |
| OKLCH | oklch(36.6% 0.051 260.6) |
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 #2F3F5A | 10.60:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #2F3F5A | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #2F3F5A text on white | 10.60:1 | AAA | Lc 94.6 | Preferred for body text |
| #2F3F5A text on black | 1.97:1 | Fails | Lc -8.0 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C1DA
oklch(80.8% 0.039 262.1)
-
Step 400
400
#8BA2C8
oklch(70.8% 0.062 260.4)
-
Step 500
500
#6E8ABA
oklch(63.1% 0.08 260.9)
-
Step 600
600
#5674A6
oklch(55.7% 0.086 260.3)
-
Step 700
700
#46618E
oklch(49.1% 0.08 260.3)
-
Step 800
800
#3A4F73
oklch(42.7% 0.066 260.8)
-
Step 900
900 (this color)
#2F3F5A
oklch(36.6% 0.051 260.6)
-
Step 950
950
#1D2736
oklch(27% 0.031 258.3)
#2F3F5A 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) | #35415B | 0.011 |
| Deuteranopia (no green cones) | #303D59 | 0.006 |
| Tritanopia (no blue cones) | #1F4548 | 0.047 |
| Achromatopsia (no color) | #3F3F3F | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3F5A
#2F3F5A
oklch(36.6% 0.051 260.6)
- #4D3C1D
#4D3C1D
oklch(36.7% 0.052 81)
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 #2F3F5A, 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 0.030
- Dark Blue Grey #1F3B4D ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.042
- Onyx #343A40 ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.047
- Midnight Green #073B4C ΔE 0.050
- Gunmetal #293241 ΔE 0.055
Use #2F3F5A 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.