#2F3753
Closest named color: Prussian Blue (#1D3557). oklch(34.3% 0.05 271.3), rgb(47, 55, 83).
Aa
White text reads best on this color (11.71:1).
About this color
#2F3753 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.050 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 11.71:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.79:1 |
| White text | 11.71:1 |
Values
| HEX | #2F3753 |
| RGB | rgb(47, 55, 83) |
| HSL | hsl(227, 28%, 25%) |
| OKLCH | oklch(34.3% 0.05 271.3) |
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 #2F3753 | 11.71:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #2F3753 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #2F3753 text on white | 11.71:1 | AAA | Lc 96.9 | Preferred for body text |
| #2F3753 text on black | 1.79:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B7C0DA
oklch(80.9% 0.038 270.4)
-
Step 400
400
#939FC7
oklch(70.7% 0.06 271.8)
-
Step 500
500
#7887B9
oklch(63.1% 0.078 271.2)
-
Step 600
600
#6170A5
oklch(55.5% 0.085 271.4)
-
Step 700
700
#505E8D
oklch(49.1% 0.078 270.7)
-
Step 800
800
#424D73
oklch(42.8% 0.065 271.1)
-
Step 900
900 (this color)
#2F3753
oklch(34.3% 0.05 271.3)
-
Step 950
950
#212636
oklch(27.1% 0.031 270.8)
#2F3753 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) | #2E3A54 | 0.009 |
| Deuteranopia (no green cones) | #2A3752 | 0.008 |
| Tritanopia (no blue cones) | #243D41 | 0.046 |
| Achromatopsia (no color) | #383838 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3753
#2F3753
oklch(34.3% 0.05 271.3)
- #423817
#423817
oklch(34.3% 0.051 92.7)
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 #2F3753, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.028
- Gunmetal #293241 ΔE 0.035
- Onyx #343A40 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.040
- Midnight Green #073B4C ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.046
- Charcoal #264653 ΔE 0.049
Use #2F3753 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.