#2A4758
Closest named color: Dark Grey Blue (#29465B). oklch(38.3% 0.045 235.4), rgb(42, 71, 88).
Aa
White text reads best on this color (9.81:1).
About this color
#2A4758 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.045 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.007 away. White text reads best on it, at 9.81:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.14:1 |
| White text | 9.81:1 |
Values
| HEX | #2A4758 |
| RGB | rgb(42, 71, 88) |
| HSL | hsl(202, 35%, 25%) |
| OKLCH | oklch(38.3% 0.045 235.4) |
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 #2A4758 | 9.81:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #2A4758 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #2A4758 text on white | 9.81:1 | AAA | Lc 92.7 | Preferred for body text |
| #2A4758 text on black | 2.14:1 | Fails | Lc -9.8 | 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
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ACC5D4
oklch(81% 0.034 234.2)
-
Step 400
400
#80A7BE
oklch(70.8% 0.054 234.4)
-
Step 500
500
#5F90AE
oklch(63% 0.07 236.3)
-
Step 600
600
#447A9A
oklch(55.6% 0.076 236.4)
-
Step 700
700
#356783
oklch(49.1% 0.07 235.2)
-
Step 800
800
#2D546B
oklch(42.7% 0.059 236.2)
-
Step 900
900 (this color)
#2A4758
oklch(38.3% 0.045 235.4)
-
Step 950
950
#182933
oklch(27.1% 0.029 235.2)
#2A4758 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) | #3F4659 | 0.029 |
| Deuteranopia (no green cones) | #394158 | 0.026 |
| Tritanopia (no blue cones) | #144B4D | 0.034 |
| Achromatopsia (no color) | #444444 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4758
#2A4758
oklch(38.3% 0.045 235.4)
- #563D2B
#563D2B
oklch(38.3% 0.045 56.7)
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 #2A4758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.007
- Charcoal #264653 ΔE 0.010
- Dark Slate Gray #2F4F4F ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Teal #014D4E ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.044
- Deep Teal #00555A ΔE 0.048
- Onyx #343A40 ΔE 0.050
Use #2A4758 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.