#2D3E99
Closest named color: Cobalt (#1E488F). oklch(40.8% 0.149 270.3), rgb(45, 62, 153).
Aa
White text reads best on this color (9.28:1).
About this color
#2D3E99 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.149 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.034 away. White text reads best on it, at 9.28:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #2D3E99 |
| RGB | rgb(45, 62, 153) |
| HSL | hsl(231, 55%, 39%) |
| OKLCH | oklch(40.8% 0.149 270.3) |
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 #2D3E99 | 9.28:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #2D3E99 | 2.26:1 | Fails | Lc 13.0 | Not readable |
| #2D3E99 text on white | 9.28:1 | AAA | Lc 91.0 | Preferred for body text |
| #2D3E99 text on black | 2.26:1 | Fails | Lc -11.3 | 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 800.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ABBEFA
oklch(80.9% 0.088 270.8)
-
Step 400
400
#7F9AF7
oklch(70.6% 0.14 270.3)
-
Step 500
500
#617EF4
oklch(63.1% 0.179 270.2)
-
Step 600
600
#4B64E3
oklch(55.7% 0.194 270.4)
-
Step 700
700
#3C52C5
oklch(49.1% 0.18 270.1)
-
Step 800
800 (this color)
#2D3E99
oklch(40.8% 0.149 270.3)
-
Step 900
900
#2B3A7E
oklch(37.6% 0.116 270.5)
-
Step 950
950
#19234A
oklch(27.1% 0.073 270.1)
#2D3E99 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) | #004C9C | 0.042 |
| Deuteranopia (no green cones) | #004297 | 0.032 |
| Tritanopia (no blue cones) | #005565 | 0.122 |
| Achromatopsia (no color) | #474747 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3E99
#2D3E99
oklch(40.8% 0.149 270.3)
- #5B4700
#5B4700
oklch(40.7% 0.083 90.3)
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 #2D3E99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.034
- Sapphire #2138AB ΔE 0.036
- Blueberry #464196 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.045
- Dusk Blue #26538D ΔE 0.062
- Twilight Blue #0A437A ΔE 0.062
- Light Navy #155084 ΔE 0.065
- Indigo Blue #3A18B1 ΔE 0.074
Use #2D3E99 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.