#2A4659
Closest named color: Dark Grey Blue (#29465B). oklch(38% 0.047 239.4), rgb(42, 70, 89).
Aa
White text reads best on this color (9.91:1).
About this color
#2A4659 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.047 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.004 away. White text reads best on it, at 9.91:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.11:1 |
| White text | 9.91:1 |
Values
| HEX | #2A4659 |
| RGB | rgb(42, 70, 89) |
| HSL | hsl(204, 36%, 26%) |
| OKLCH | oklch(38% 0.047 239.4) |
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 #2A4659 | 9.91:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #2A4659 | 2.11:1 | Fails | Lc 11.0 | Not readable |
| #2A4659 text on white | 9.91:1 | AAA | Lc 92.9 | Preferred for body text |
| #2A4659 text on black | 2.11:1 | Fails | Lc -9.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE5
oklch(88.5% 0.02 240.8)
-
Step 300
300
#ADC4D5
oklch(80.8% 0.035 240)
-
Step 400
400
#81A6C0
oklch(70.7% 0.056 239.2)
-
Step 500
500
#6090B1
oklch(63.2% 0.072 239.4)
-
Step 600
600
#457A9C
oklch(55.7% 0.078 238.4)
-
Step 700
700
#366686
oklch(49.1% 0.073 239.8)
-
Step 800
800
#2E536D
oklch(42.6% 0.061 240.8)
-
Step 900
900 (this color)
#2A4659
oklch(38% 0.047 239.4)
-
Step 950
950
#182934
oklch(27.1% 0.031 237.8)
#2A4659 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) | #3E465A | 0.027 |
| Deuteranopia (no green cones) | #374159 | 0.022 |
| Tritanopia (no blue cones) | #134B4C | 0.038 |
| Achromatopsia (no color) | #434343 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4659
#2A4659
oklch(38% 0.047 239.4)
- #553C29
#553C29
oklch(37.9% 0.046 58)
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 #2A4659, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.004
- Charcoal #264653 ΔE 0.012
- Dark Slate Gray #2F4F4F ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.042
- Dark Teal #014D4E ΔE 0.044
- Onyx #343A40 ΔE 0.049
- Deep Teal #00555A ΔE 0.052
Use #2A4659 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.