#2A436F
Closest named color: Twilight Blue (#0A437A). oklch(38.5% 0.081 261), rgb(42, 67, 111).
Aa
White text reads best on this color (9.85:1).
About this color
#2A436F is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.081 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 9.85:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.13:1 |
| White text | 9.85:1 |
Values
| HEX | #2A436F |
| RGB | rgb(42, 67, 111) |
| HSL | hsl(218, 45%, 30%) |
| OKLCH | oklch(38.5% 0.081 261) |
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 #2A436F | 9.85:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #2A436F | 2.13:1 | Fails | Lc 11.2 | Not readable |
| #2A436F text on white | 9.85:1 | AAA | Lc 92.7 | Preferred for body text |
| #2A436F text on black | 2.13:1 | Fails | Lc -9.7 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ABC2E9
oklch(81% 0.061 261)
-
Step 400
400
#7EA1DE
oklch(70.7% 0.098 261.2)
-
Step 500
500
#5D88D5
oklch(63% 0.126 261.3)
-
Step 600
600
#4371C2
oklch(55.6% 0.136 260.9)
-
Step 700
700
#355EA7
oklch(49% 0.126 261)
-
Step 800
800
#2C4D88
oklch(42.7% 0.106 261.1)
-
Step 900
900 (this color)
#2A436F
oklch(38.5% 0.081 261)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#2A436F 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) | #304771 | 0.015 |
| Deuteranopia (no green cones) | #27406E | 0.010 |
| Tritanopia (no blue cones) | #004D53 | 0.072 |
| Achromatopsia (no color) | #434343 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A436F
#2A436F
oklch(38.5% 0.081 261)
- #593E00
#593E00
oklch(38.4% 0.079 80.8)
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 #2A436F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.038
- Light Navy #155084 ΔE 0.047
- Marine Blue #01386A ΔE 0.052
- Charcoal #264653 ΔE 0.053
- Cobalt #1E488F ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.060
Use #2A436F 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.