#1F2D43
Closest named color: Space Cadet (#2B2D42). oklch(29.6% 0.045 259.2), rgb(31, 45, 67).
Aa
White text reads best on this color (13.86:1).
About this color
#1F2D43 is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.045 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.019 away. White text reads best on it, at 13.86:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.51:1 |
| White text | 13.86:1 |
Values
| HEX | #1F2D43 |
| RGB | rgb(31, 45, 67) |
| HSL | hsl(217, 37%, 19%) |
| OKLCH | oklch(29.6% 0.045 259.2) |
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 #1F2D43 | 13.86:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #1F2D43 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #1F2D43 text on white | 13.86:1 | AAA | Lc 100.4 | Preferred for body text |
| #1F2D43 text on black | 1.51:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E3
oklch(80.9% 0.052 259.4)
-
Step 400
400
#81A2D6
oklch(70.7% 0.085 259.3)
-
Step 500
500
#618ACB
oklch(63.1% 0.109 259.3)
-
Step 600
600
#4873B7
oklch(55.6% 0.117 259.2)
-
Step 700
700
#39609E
oklch(49.1% 0.109 259.3)
-
Step 800
800
#2F4F80
oklch(42.8% 0.09 258.7)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950 (this color)
#1F2D43
oklch(29.6% 0.045 259.2)
#1F2D43 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) | #252E44 | 0.010 |
| Deuteranopia (no green cones) | #202B43 | 0.007 |
| Tritanopia (no blue cones) | #103235 | 0.040 |
| Achromatopsia (no color) | #2D2D2D | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2D43
#1F2D43
oklch(29.6% 0.045 259.2)
- #392A11
#392A11
oklch(29.6% 0.045 78.4)
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 #1F2D43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.019
- Gunmetal #293241 ΔE 0.025
- Oxford Blue #1B263B ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.040
- Dark #1B2431 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.046
- Midnight Green #073B4C ΔE 0.047
- Jet #212529 ΔE 0.049
Use #1F2D43 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.