#2F374F
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34% 0.044 269.8), rgb(47, 55, 79).
Aa
White text reads best on this color (11.79:1).
About this color
#2F374F is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.044 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.025 away. White text reads best on it, at 11.79:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.78:1 |
| White text | 11.79:1 |
Values
| HEX | #2F374F |
| RGB | rgb(47, 55, 79) |
| HSL | hsl(225, 25%, 25%) |
| OKLCH | oklch(34% 0.044 269.8) |
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 #2F374F | 11.79:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #2F374F | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #2F374F text on white | 11.79:1 | AAA | Lc 97.1 | Preferred for body text |
| #2F374F text on black | 1.78:1 | Fails | Lc 0.0 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B8C0D7
oklch(80.9% 0.034 270.4)
-
Step 400
400
#93A0C2
oklch(70.7% 0.052 268.6)
-
Step 500
500
#7988B3
oklch(63.1% 0.067 269.5)
-
Step 600
600
#62719F
oklch(55.5% 0.074 270)
-
Step 700
700
#515F88
oklch(49.1% 0.068 269.3)
-
Step 800
800
#434E6E
oklch(42.8% 0.055 269.4)
-
Step 900
900 (this color)
#2F374F
oklch(34% 0.044 269.8)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#2F374F 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) | #2F3950 | 0.006 |
| Deuteranopia (no green cones) | #2C364E | 0.006 |
| Tritanopia (no blue cones) | #253C3F | 0.040 |
| Achromatopsia (no color) | #383838 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F374F
#2F374F
oklch(34% 0.044 269.8)
- #41371C
#41371C
oklch(34% 0.044 89.7)
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 #2F374F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.025
- Gunmetal #293241 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.030
- Onyx #343A40 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.037
- Midnight Green #073B4C ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.047
- Charcoal #264653 ΔE 0.048
Use #2F374F 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.