#2A556A
Closest named color: Petrol (#005F6A). oklch(42.8% 0.059 231.6), rgb(42, 85, 106).
Aa
White text reads best on this color (8.05:1).
About this color
#2A556A is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.059 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.036 away. White text reads best on it, at 8.05:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #2A556A |
| RGB | rgb(42, 85, 106) |
| HSL | hsl(200, 43%, 29%) |
| OKLCH | oklch(42.8% 0.059 231.6) |
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 #2A556A | 8.05:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #2A556A | 2.60:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #2A556A text on white | 8.05:1 | AAA | Lc 87.8 | Fine for body text |
| #2A556A text on black | 2.60:1 | Fails | Lc -14.4 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D3
oklch(80.8% 0.034 231.3)
-
Step 400
400
#7EA7BD
oklch(70.6% 0.055 231.9)
-
Step 500
500
#5B91AD
oklch(63% 0.071 232.1)
-
Step 600
600
#407B98
oklch(55.5% 0.076 231.7)
-
Step 700
700
#316882
oklch(49.1% 0.071 231.2)
-
Step 800
800 (this color)
#2A556A
oklch(42.8% 0.059 231.6)
-
Step 900
900
#274656
oklch(37.7% 0.046 232.3)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#2A556A 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) | #4B546B | 0.041 |
| Deuteranopia (no green cones) | #424D6A | 0.036 |
| Tritanopia (no blue cones) | #005B5C | 0.042 |
| Achromatopsia (no color) | #505050 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A556A
#2A556A
oklch(42.8% 0.059 231.6)
- #694630
#694630
oklch(42.8% 0.059 52.7)
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 #2A556A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.036
- YInMn Blue #415A77 ΔE 0.038
- Deep Teal #00555A ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.050
- Light Navy #155084 ΔE 0.052
Use #2A556A 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.