#1D4B59
Closest named color: Charcoal (#264653). oklch(38.7% 0.055 221), rgb(29, 75, 89).
Aa
White text reads best on this color (9.53:1).
About this color
#1D4B59 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.055 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.017 away. White text reads best on it, at 9.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.20:1 |
| White text | 9.53:1 |
Values
| HEX | #1D4B59 |
| RGB | rgb(29, 75, 89) |
| HSL | hsl(194, 51%, 23%) |
| OKLCH | oklch(38.7% 0.055 221) |
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 #1D4B59 | 9.53:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #1D4B59 | 2.20:1 | Fails | Lc 12.1 | Not readable |
| #1D4B59 text on white | 9.53:1 | AAA | Lc 91.9 | Preferred for body text |
| #1D4B59 text on black | 2.20:1 | Fails | Lc -10.5 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A4C7D4
oklch(80.8% 0.042 222.4)
-
Step 400
400
#71AABE
oklch(70.6% 0.066 222.1)
-
Step 500
500
#4795AD
oklch(63% 0.084 220.8)
-
Step 600
600
#227F99
oklch(55.6% 0.092 221.2)
-
Step 700
700
#126B83
oklch(49.1% 0.085 221.7)
-
Step 800
800
#14576A
oklch(42.6% 0.071 221.6)
-
Step 900
900 (this color)
#1D4B59
oklch(38.7% 0.055 221)
-
Step 950
950
#112A32
oklch(26.9% 0.034 221.3)
#1D4B59 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) | #43495A | 0.046 |
| Deuteranopia (no green cones) | #3A4359 | 0.040 |
| Tritanopia (no blue cones) | #00504F | 0.031 |
| Achromatopsia (no color) | #454545 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4B59
#1D4B59
oklch(38.7% 0.055 221)
- #5D3A2D
#5D3A2D
oklch(38.6% 0.054 41.1)
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 #1D4B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.017
- Dark Grey Blue #29465B ΔE 0.020
- Dark Teal #014D4E ΔE 0.028
- Dark Slate Gray #2F4F4F ΔE 0.030
- Deep Teal #00555A ΔE 0.033
- Dark Blue Green #005249 ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
Use #1D4B59 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.