#2A456B
Closest named color: Dark Grey Blue (#29465B). oklch(38.8% 0.073 257.1), rgb(42, 69, 107).
Aa
White text reads best on this color (9.71:1).
About this color
#2A456B is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.073 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 9.71:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.16:1 |
| White text | 9.71:1 |
Values
| HEX | #2A456B |
| RGB | rgb(42, 69, 107) |
| HSL | hsl(215, 44%, 29%) |
| OKLCH | oklch(38.8% 0.073 257.1) |
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 #2A456B | 9.71:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #2A456B | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #2A456B text on white | 9.71:1 | AAA | Lc 92.4 | Preferred for body text |
| #2A456B text on black | 2.16:1 | Fails | Lc -10.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E4
oklch(80.8% 0.054 258)
-
Step 400
400
#7DA3D7
oklch(70.8% 0.087 256.4)
-
Step 500
500
#5C8BCC
oklch(63.1% 0.111 256.7)
-
Step 600
600
#4274B9
oklch(55.7% 0.121 256.8)
-
Step 700
700
#3361A0
oklch(49.2% 0.113 256.8)
-
Step 800
800
#2B4F81
oklch(42.6% 0.093 257)
-
Step 900
900 (this color)
#2A456B
oklch(38.8% 0.073 257.1)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#2A456B 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) | #35486D | 0.018 |
| Deuteranopia (no green cones) | #2D416A | 0.012 |
| Tritanopia (no blue cones) | #004E53 | 0.064 |
| Achromatopsia (no color) | #444444 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A456B
#2A456B
oklch(38.8% 0.073 257.1)
- #5A3F0E
#5A3F0E
oklch(38.9% 0.073 77.7)
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 #2A456B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Twilight Blue #0A437A ΔE 0.037
- Charcoal #264653 ΔE 0.044
- Light Navy #155084 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.054
- Marine Blue #01386A ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.059
- Cobalt #1E488F ΔE 0.060
Use #2A456B 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.