#1D4151
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.6% 0.05 229.4), rgb(29, 65, 81).
Aa
White text reads best on this color (10.89:1).
About this color
#1D4151 is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.050 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.019 away. White text reads best on it, at 10.89:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.92:1 |
| White text | 10.89:1 |
Values
| HEX | #1D4151 |
| RGB | rgb(29, 65, 81) |
| HSL | hsl(198, 47%, 22%) |
| OKLCH | oklch(35.6% 0.05 229.4) |
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 #1D4151 | 10.89:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #1D4151 | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #1D4151 text on white | 10.89:1 | AAA | Lc 95.1 | Preferred for body text |
| #1D4151 text on black | 1.92:1 | Fails | Lc -7.5 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D4
oklch(81% 0.037 228.5)
-
Step 400
400
#7AA8BF
oklch(70.7% 0.06 230.3)
-
Step 500
500
#5592AF
oklch(63% 0.077 230.2)
-
Step 600
600
#387C9A
oklch(55.5% 0.083 229.7)
-
Step 700
700
#296984
oklch(49.2% 0.077 229.2)
-
Step 800
800
#24556B
oklch(42.6% 0.064 230.2)
-
Step 900
900 (this color)
#1D4151
oklch(35.6% 0.05 229.4)
-
Step 950
950
#152933
oklch(26.9% 0.032 231.4)
#1D4151 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) | #394052 | 0.036 |
| Deuteranopia (no green cones) | #313A51 | 0.031 |
| Tritanopia (no blue cones) | #004646 | 0.035 |
| Achromatopsia (no color) | #3D3D3D | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4151
#1D4151
oklch(35.6% 0.05 229.4)
- #513424
#513424
oklch(35.5% 0.05 49.5)
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 #1D4151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.019
- Charcoal #264653 ΔE 0.020
- Dark Grey Blue #29465B ΔE 0.027
- Midnight Green #073B4C ΔE 0.029
- Onyx #343A40 ΔE 0.039
- Dark Teal #014D4E ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.046
Use #1D4151 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.