#1F5259
Closest named color: Deep Teal (#00555A). oklch(40.7% 0.055 207.6), rgb(31, 82, 89).
Aa
White text reads best on this color (8.71:1).
About this color
#1F5259 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.055 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.016 away. White text reads best on it, at 8.71:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.40:1 |
| White text | 8.71:1 |
Values
| HEX | #1F5259 |
| RGB | rgb(31, 82, 89) |
| HSL | hsl(187, 48%, 24%) |
| OKLCH | oklch(40.7% 0.055 207.6) |
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 #1F5259 | 8.71:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #1F5259 | 2.40:1 | Fails | Lc 14.3 | Not readable |
| #1F5259 text on white | 8.71:1 | AAA | Lc 89.7 | Fine for body text |
| #1F5259 text on black | 2.40:1 | Fails | Lc -12.6 | 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 800.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDDF
oklch(88.5% 0.018 205.3)
-
Step 300
300
#AAC7CB
oklch(80.9% 0.032 206.7)
-
Step 400
400
#7BAAB1
oklch(70.7% 0.051 207.6)
-
Step 500
500
#57959E
oklch(63.1% 0.065 207.6)
-
Step 600
600
#397F89
oklch(55.6% 0.071 207.9)
-
Step 700
700
#2B6B74
oklch(49% 0.066 207.9)
-
Step 800
800 (this color)
#1F5259
oklch(40.7% 0.055 207.6)
-
Step 900
900
#24484D
oklch(37.7% 0.042 207.2)
-
Step 950
950
#162A2D
oklch(26.9% 0.026 207.9)
#1F5259 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) | #4B4F59 | 0.053 |
| Deuteranopia (no green cones) | #424859 | 0.049 |
| Tritanopia (no blue cones) | #005654 | 0.023 |
| Achromatopsia (no color) | #4B4B4B | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F5259
#1F5259
oklch(40.7% 0.055 207.6)
- #643E39
#643E39
oklch(40.7% 0.055 27.9)
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 #1F5259, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.016
- Dark Slate Gray #2F4F4F ΔE 0.020
- Dark Teal #014D4E ΔE 0.030
- Dark Blue Green #005249 ΔE 0.034
- Charcoal #264653 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.041
- Petrol #005F6A ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.058
Use #1F5259 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.