#2B3B59
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.3% 0.057 262.4), rgb(43, 59, 89).
Aa
White text reads best on this color (11.21:1).
About this color
#2B3B59 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.057 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.028 away. White text reads best on it, at 11.21:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.87:1 |
| White text | 11.21:1 |
Values
| HEX | #2B3B59 |
| RGB | rgb(43, 59, 89) |
| HSL | hsl(219, 35%, 26%) |
| OKLCH | oklch(35.3% 0.057 262.4) |
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 #2B3B59 | 11.21:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #2B3B59 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #2B3B59 text on white | 11.21:1 | AAA | Lc 95.8 | Preferred for body text |
| #2B3B59 text on black | 1.87:1 | Fails | Lc 0.0 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B2C1DD
oklch(80.9% 0.043 263)
-
Step 400
400
#8AA1CC
oklch(70.7% 0.068 262.8)
-
Step 500
500
#6D89BE
oklch(63% 0.087 262.7)
-
Step 600
600
#5573AB
oklch(55.7% 0.094 262.2)
-
Step 700
700
#456093
oklch(49.1% 0.088 262.4)
-
Step 800
800
#394E77
oklch(42.6% 0.073 263)
-
Step 900
900 (this color)
#2B3B59
oklch(35.3% 0.057 262.4)
-
Step 950
950
#1D2638
oklch(26.9% 0.036 263.7)
#2B3B59 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) | #303D5A | 0.010 |
| Deuteranopia (no green cones) | #2B3958 | 0.006 |
| Tritanopia (no blue cones) | #184146 | 0.049 |
| Achromatopsia (no color) | #3B3B3B | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3B59
#2B3B59
oklch(35.3% 0.057 262.4)
- #4A3815
#4A3815
oklch(35.3% 0.056 81.7)
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 #2B3B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.040
- Midnight Green #073B4C ΔE 0.043
- Onyx #343A40 ΔE 0.045
- Gunmetal #293241 ΔE 0.046
- Marine Blue #01386A ΔE 0.049
Use #2B3B59 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.