#215B74
Closest named color: Petrol (#005F6A). oklch(44.5% 0.072 230), rgb(33, 91, 116).
Aa
White text reads best on this color (7.46:1).
About this color
#215B74 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.072 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.028 away. White text reads best on it, at 7.46:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #215B74 |
| RGB | rgb(33, 91, 116) |
| HSL | hsl(198, 56%, 29%) |
| OKLCH | oklch(44.5% 0.072 230) |
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 #215B74 | 7.46:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #215B74 | 2.81:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #215B74 text on white | 7.46:1 | AAA | Lc 85.7 | Fine for body text |
| #215B74 text on black | 2.81:1 | Fails | Lc -16.3 | Dividers and decoration only |
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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#74A9C3
oklch(70.7% 0.068 230.1)
-
Step 500
500
#4D93B4
oklch(63.1% 0.086 230.7)
-
Step 600
600
#2B7D9F
oklch(55.6% 0.093 229.7)
-
Step 700
700
#1D6988
oklch(49% 0.087 230.1)
-
Step 800
800 (this color)
#215B74
oklch(44.5% 0.072 230)
-
Step 900
900
#1D475A
oklch(37.7% 0.057 230.4)
-
Step 950
950
#122A34
oklch(27.1% 0.035 227.4)
#215B74 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) | #4E5A75 | 0.050 |
| Deuteranopia (no green cones) | #435174 | 0.044 |
| Tritanopia (no blue cones) | #006263 | 0.044 |
| Achromatopsia (no color) | #555555 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #215B74
#215B74
oklch(44.5% 0.072 230)
- #74472E
#74472E
oklch(44.4% 0.072 49.2)
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 #215B74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.028
- YInMn Blue #415A77 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.039
- Light Navy #155084 ΔE 0.050
- Deep Teal #00555A ΔE 0.050
- Dark Aqua #05696B ΔE 0.052
- Denim #3B638C ΔE 0.052
Use #215B74 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.