#2D4373
Closest named color: Twilight Blue (#0A437A). oklch(39% 0.086 264.2), rgb(45, 67, 115).
Aa
White text reads best on this color (9.71:1).
About this color
#2D4373 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.086 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 9.71:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.16:1 |
| White text | 9.71:1 |
Values
| HEX | #2D4373 |
| RGB | rgb(45, 67, 115) |
| HSL | hsl(221, 44%, 31%) |
| OKLCH | oklch(39% 0.086 264.2) |
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 #2D4373 | 9.71:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #2D4373 | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #2D4373 text on white | 9.71:1 | AAA | Lc 92.4 | Preferred for body text |
| #2D4373 text on black | 2.16:1 | Fails | Lc -10.1 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E2
oklch(70.8% 0.104 264.1)
-
Step 500
500
#6086D9
oklch(63% 0.133 264.3)
-
Step 600
600
#476FC7
oklch(55.7% 0.144 263.9)
-
Step 700
700
#395CAC
oklch(49.1% 0.134 264.3)
-
Step 800
800
#2F4C8B
oklch(42.8% 0.11 263.8)
-
Step 900
900 (this color)
#2D4373
oklch(39% 0.086 264.2)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#2D4373 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) | #2F4875 | 0.016 |
| Deuteranopia (no green cones) | #254172 | 0.012 |
| Tritanopia (no blue cones) | #004E55 | 0.077 |
| Achromatopsia (no color) | #444444 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D4373
#2D4373
oklch(39% 0.086 264.2)
- #594000
#594000
oklch(38.9% 0.08 83.4)
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 #2D4373, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Light Navy #155084 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.046
- Cobalt #1E488F ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.054
- Marine Blue #01386A ΔE 0.056
- Dusk Blue #26538D ΔE 0.058
- Charcoal #264653 ΔE 0.060
Use #2D4373 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.