#1D2233
Closest named color: Dark (#1B2431). oklch(25.5% 0.033 271.3), rgb(29, 34, 51).
Aa
White text reads best on this color (15.80:1).
About this color
#1D2233 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.033 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.009 away. White text reads best on it, at 15.80:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.32:1 |
| White text | 15.80:1 |
Values
| HEX | #1D2233 |
| RGB | rgb(29, 34, 51) |
| HSL | hsl(226, 28%, 16%) |
| OKLCH | oklch(25.5% 0.033 271.3) |
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 #1D2233 | 15.80:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #1D2233 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #1D2233 text on white | 15.80:1 | AAA | Lc 102.7 | Preferred for body text |
| #1D2233 text on black | 1.32:1 | 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 950.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B7C0DB
oklch(80.9% 0.039 270.9)
-
Step 400
400
#929FC8
oklch(70.7% 0.062 271)
-
Step 500
500
#7887BA
oklch(63.1% 0.079 271.4)
-
Step 600
600
#6170A7
oklch(55.6% 0.088 271.7)
-
Step 700
700
#505E8F
oklch(49.2% 0.081 271.1)
-
Step 800
800
#424D74
oklch(42.8% 0.066 271.4)
-
Step 900
900
#37405E
oklch(37.7% 0.053 270.9)
-
Step 950
950 (this color)
#1D2233
oklch(25.5% 0.033 271.3)
#1D2233 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) | #1C2434 | 0.007 |
| Deuteranopia (no green cones) | #1B2233 | 0.003 |
| Tritanopia (no blue cones) | #162528 | 0.029 |
| Achromatopsia (no color) | #232323 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D2233
#1D2233
oklch(25.5% 0.033 271.3)
- #29220F
#29220F
oklch(25.5% 0.033 89.7)
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 #1D2233, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.009
- Oxford Blue #1B263B ΔE 0.018
- Jet #212529 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.050
- Gunmetal #293241 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.081
- Navy Blue #001146 ΔE 0.083
Use #1D2233 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.