#2D3F5D
Closest named color: Dark Grey Blue (#29465B). oklch(36.7% 0.057 260.3), rgb(45, 63, 93).
Aa
White text reads best on this color (10.60:1).
About this color
#2D3F5D is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.057 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.024 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.60:1 |
Values
| HEX | #2D3F5D |
| RGB | rgb(45, 63, 93) |
| HSL | hsl(218, 35%, 27%) |
| OKLCH | oklch(36.7% 0.057 260.3) |
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 #2D3F5D | 10.60:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #2D3F5D | 1.98:1 | Fails | Lc 9.4 | Not readable |
| #2D3F5D text on white | 10.60:1 | AAA | Lc 94.5 | Preferred for body text |
| #2D3F5D text on black | 1.98:1 | Fails | Lc -8.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DD
oklch(81% 0.043 259.6)
-
Step 400
400
#88A2CC
oklch(70.8% 0.068 259.9)
-
Step 500
500
#6A8ABF
oklch(63.1% 0.088 260.2)
-
Step 600
600
#5273AB
oklch(55.5% 0.096 260.5)
-
Step 700
700
#436193
oklch(49.2% 0.088 260.2)
-
Step 800
800
#374F77
oklch(42.7% 0.073 260.2)
-
Step 900
900 (this color)
#2D3F5D
oklch(36.7% 0.057 260.3)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#2D3F5D 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) | #34415E | 0.012 |
| Deuteranopia (no green cones) | #2E3D5C | 0.006 |
| Tritanopia (no blue cones) | #19454A | 0.049 |
| Achromatopsia (no color) | #3F3F3F | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3F5D
#2D3F5D
oklch(36.7% 0.057 260.3)
- #4E3B18
#4E3B18
oklch(36.5% 0.057 80.6)
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 #2D3F5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.024
- Charcoal #264653 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.041
- Onyx #343A40 ΔE 0.049
- Midnight Green #073B4C ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.053
- Marine Blue #01386A ΔE 0.053
Use #2D3F5D 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.