#2D3B89
Closest named color: Cobalt (#1E488F). oklch(38.8% 0.13 271.3), rgb(45, 59, 137).
Aa
White text reads best on this color (10.00:1).
About this color
#2D3B89 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.130 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.036 away. White text reads best on it, at 10.00:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.09:1 |
| White text | 10.00:1 |
Values
| HEX | #2D3B89 |
| RGB | rgb(45, 59, 137) |
| HSL | hsl(231, 51%, 36%) |
| OKLCH | oklch(38.8% 0.13 271.3) |
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 #2D3B89 | 10.00:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #2D3B89 | 2.09:1 | Fails | Lc 11.1 | Not readable |
| #2D3B89 text on white | 10.00:1 | AAA | Lc 92.9 | Preferred for body text |
| #2D3B89 text on black | 2.09:1 | Fails | Lc -9.6 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CCD8FE
oklch(88.5% 0.054 271.5)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7F99FF
oklch(70.8% 0.152 271.3)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#4A5EF0
oklch(55.6% 0.218 271.3)
-
Step 700
700
#3C4CD1
oklch(49% 0.203 271.3)
-
Step 800
800
#3140A9
oklch(42.8% 0.168 271.1)
-
Step 900
900 (this color)
#2D3B89
oklch(38.8% 0.13 271.3)
-
Step 950
950
#19214E
oklch(26.9% 0.083 272.1)
#2D3B89 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) | #00478C | 0.041 |
| Deuteranopia (no green cones) | #003E87 | 0.035 |
| Tritanopia (no blue cones) | #004E5C | 0.109 |
| Achromatopsia (no color) | #424242 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3B89
#2D3B89
oklch(38.8% 0.13 271.3)
- #544200
#544200
oklch(38.7% 0.079 91.1)
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 #2D3B89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.036
- Dark Slate Blue #483D8B ΔE 0.042
- Twilight Blue #0A437A ΔE 0.045
- Blueberry #464196 ΔE 0.047
- Sapphire #2138AB ΔE 0.058
- Light Navy #155084 ΔE 0.061
- Dusk Blue #26538D ΔE 0.066
- Marine Blue #01386A ΔE 0.068
Use #2D3B89 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.