#2A4B59
Closest named color: Dark Grey Blue (#29465B). oklch(39.4% 0.045 227.2), rgb(42, 75, 89).
Aa
White text reads best on this color (9.33:1).
About this color
#2A4B59 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.045 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.018 away. White text reads best on it, at 9.33:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #2A4B59 |
| RGB | rgb(42, 75, 89) |
| HSL | hsl(198, 36%, 26%) |
| OKLCH | oklch(39.4% 0.045 227.2) |
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 #2A4B59 | 9.33:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #2A4B59 | 2.24:1 | Fails | Lc 12.5 | Not readable |
| #2A4B59 text on white | 9.33:1 | AAA | Lc 91.5 | Preferred for body text |
| #2A4B59 text on black | 2.24:1 | Fails | Lc -10.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ABC6D2
oklch(81% 0.034 226.4)
-
Step 400
400
#7DA8BB
oklch(70.7% 0.054 227)
-
Step 500
500
#5A92AA
oklch(63% 0.069 227.2)
-
Step 600
600
#3D7C96
oklch(55.5% 0.076 227.5)
-
Step 700
700
#2F6980
oklch(49.2% 0.07 226.9)
-
Step 800
800
#285568
oklch(42.6% 0.059 228.1)
-
Step 900
900 (this color)
#2A4B59
oklch(39.4% 0.045 227.2)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#2A4B59 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) | #444A5A | 0.035 |
| Deuteranopia (no green cones) | #3D4459 | 0.032 |
| Tritanopia (no blue cones) | #114F4F | 0.033 |
| Achromatopsia (no color) | #474747 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4B59
#2A4B59
oklch(39.4% 0.045 227.2)
- #5A3F31
#5A3F31
oklch(39.4% 0.044 48.4)
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 #2A4B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.018
- Charcoal #264653 ΔE 0.018
- Dark Slate Gray #2F4F4F ΔE 0.025
- Dark Teal #014D4E ΔE 0.037
- Deep Teal #00555A ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Blue Green #005249 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.056
Use #2A4B59 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.