#2D3E73
Closest named color: Twilight Blue (#0A437A). oklch(37.8% 0.093 268.3), rgb(45, 62, 115).
Aa
White text reads best on this color (10.25:1).
About this color
#2D3E73 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.093 and its hue 268°. 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 10.25:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #2D3E73 |
| RGB | rgb(45, 62, 115) |
| HSL | hsl(225, 44%, 31%) |
| OKLCH | oklch(37.8% 0.093 268.3) |
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 #2D3E73 | 10.25:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #2D3E73 | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #2D3E73 text on white | 10.25:1 | AAA | Lc 93.6 | Preferred for body text |
| #2D3E73 text on black | 2.04:1 | Fails | Lc -8.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0EF
oklch(81% 0.07 267.6)
-
Step 400
400
#839DE7
oklch(70.6% 0.113 268.7)
-
Step 500
500
#6583DF
oklch(63% 0.143 268.5)
-
Step 600
600
#4D6BCD
oklch(55.6% 0.155 268.2)
-
Step 700
700
#3F59B2
oklch(49.2% 0.144 268.4)
-
Step 800
800
#344990
oklch(42.8% 0.12 268.6)
-
Step 900
900 (this color)
#2D3E73
oklch(37.8% 0.093 268.3)
-
Step 950
950
#1A2443
oklch(26.9% 0.06 268.7)
#2D3E73 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) | #264475 | 0.018 |
| Deuteranopia (no green cones) | #1D3E72 | 0.018 |
| Tritanopia (no blue cones) | #004A53 | 0.082 |
| Achromatopsia (no color) | #414141 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3E73
#2D3E73
oklch(37.8% 0.093 268.3)
- #533F00
#533F00
oklch(37.9% 0.077 88.3)
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 #2D3E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Marine Blue #01386A ΔE 0.048
- Cobalt #1E488F ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.054
- Light Navy #155084 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.067
Use #2D3E73 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.