#2F3B60
Closest named color: Prussian Blue (#1D3557). oklch(36% 0.066 269.3), rgb(47, 59, 96).
Aa
White text reads best on this color (10.96:1).
About this color
#2F3B60 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.066 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.035 away. White text reads best on it, at 10.96:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #2F3B60 |
| RGB | rgb(47, 59, 96) |
| HSL | hsl(225, 34%, 28%) |
| OKLCH | oklch(36% 0.066 269.3) |
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 #2F3B60 | 10.96:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #2F3B60 | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #2F3B60 text on white | 10.96:1 | AAA | Lc 95.3 | Preferred for body text |
| #2F3B60 text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B3C0E2
oklch(80.9% 0.05 268.8)
-
Step 400
400
#8C9FD3
oklch(70.7% 0.079 268.8)
-
Step 500
500
#7186C7
oklch(63.1% 0.101 269.7)
-
Step 600
600
#596FB4
oklch(55.6% 0.111 269.2)
-
Step 700
700
#495D9B
oklch(49.2% 0.102 268.9)
-
Step 800
800
#3C4C7E
oklch(42.7% 0.086 269.1)
-
Step 900
900 (this color)
#2F3B60
oklch(36% 0.066 269.3)
-
Step 950
950
#1E253B
oklch(26.9% 0.042 269.9)
#2F3B60 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) | #2D3F62 | 0.012 |
| Deuteranopia (no green cones) | #283A5F | 0.011 |
| Tritanopia (no blue cones) | #1C4349 | 0.059 |
| Achromatopsia (no color) | #3C3C3C | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3B60
#2F3B60
oklch(36% 0.066 269.3)
- #4B3B0B
#4B3B0B
oklch(36% 0.066 89.3)
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 #2F3B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.041
- Marine Blue #01386A ΔE 0.047
- Charcoal #264653 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.053
- Midnight Green #073B4C ΔE 0.056
- Onyx #343A40 ΔE 0.056
Use #2F3B60 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.